GIRLS FRONTLINE 2 BEGINNER'S GUIDE

Codes

Go to settings on the bottom left of the main menu and click on the Redeem Code button, and type the following codes for free rewards
These codes only work on the Darkwinter server, and most will expire around a month after the game released
GFL2LAUNCH
GF2EXILIUM
GFL2GIFT
GFL2OTS14
GFL2SUOMI
GFL2REWARD
1203GFL2
GFL2GIFTME
GFL2DOLLS
GFL2A2C9LF
ELMOLIVE
OMNGKTWN
GFL2ITASHA
GFL2DC
DC100K

Installing

The app is available on the android Play Store, the iphone App Store, on PC with Steam and also on PC on the official website

If you're going to play on PC and the official website tells you that the game isn't available to download from your region, just click the link below instead
https://gf2-us-cdn-launcher.sunborngame.com/prod/download/launcher/1.0.0/GF2_Launcher_pc1_1_0_0_OverSeas_Mica_1732302259_6_1000005.exe

Terminology for beginners

-T-Doll: The characters you use in this game. They're female looking robots with superhuman strength.
-Weapons: Equipment a T-doll uses, they're either Assault rifles (AR), Sniper rifles (RF), Handguns (HG), Machine guns (MG), Submachine guns (SMG) or Swords(BLD).
-Confectance Index: A meter that a T-doll has in battle that is consumed to activate special skills. Just think of it as a mana or magic meter from other video games. The minimum the meter can be at is 0 and the maximum is 6. Every T-doll has a different way of gaining and losing meter, it all depends on their kit.
-Gems: 150 gems= 1 roll on any banner
-Orange ticket: 1 roll on either a rate-up limited banner or on a rate-up permanent unit banner
-Black ticket: 1 roll on the permanent gacha
-Vertebrae: Dupes. When you obtain a T-doll from the gacha that you already had, you can upgrade the "vertebrae" level of the T-doll which gives the T-doll additional effects

Quick FAQ

-Should I reroll?
You probably should try to reroll to obtain Suomi from the limited banner within 10-20 pulls, so that you have a higher stock of limited pulls for future T-dolls compared to everyone else. Unfortunately, this guide doesn't cover rerolling, because the game just came out and I don't know the methods. A google search might help you.

-What's the difference between the two servers, the Darkwinter servers and the Haoplay servers?
-Because different countries have different regulations regarding payments, there will be two different servers for the english release of the game. For some unknown reason, there is a two day gap between the servers. The Darkwinter server opened on December 3rd and the Haoplay server opened on December 5th, so the Darkwinter server will get content 2 days in advance. Also, people from the Darkwinter servers can't interact with people from the Haoplay servers and vice versa. This means no friend requests, pvp, using support T-dolls, nor sharing guilds with people from different servers

-Is this character good? Should I roll her weapon?
Check the tier list near the bottom, also weapons as f2p players aren't worth rolling but that varies depending on whether you're more of a "I wanna collect all T-dolls" guy or a "I skip alot of T-dolls and focus on getting the meta T-dolls only" guy

-What attachment set for x character
You unlock attachments and attachment farming once you're level 23. Every T-doll in the game wants the Phase Strike attachment set except for Ksenia and Colphne, those two want the Emergency Repair attachment set
If you have two or more of the same attachment that can go in the same slot in a weapon, prioritize equipping the one that gives ATK buffs
Also, check the "Guide to selecting weapons and attachments for your T-dolls" section of this guide

-Gift guide? How do I raise the affection of my T-dolls?
You might want to check these two images
https://files.catbox.moe/d0o91y.png
https://files.catbox.moe/ysfhke.jpg

Guide to the Daily Gameplay Loop

This section is for all the things you need to remind yourself to do on the game. Everything here has either roll currency or cores as a reward

Daily

1. Claim the daily free box (Obtained in Shop→Quality Selection→Standard Package)
2. Set your 10 T-dolls on the T-doll dispatch system (Public Area→Dispatch Room), unlocked at around level 15 (i think?)
3. Complete the 4 battle pass missions (if available) and claim your battle pass rewards
4. After that, spend all your remaining stamina on any stage you want; T-doll exp, weapon exp, tier 4(purple), tier 5 (gold) and tier 6 (also gold) conductor stages, and sometimes attachment stages are my go-to resource stages to use up all my stamina. Around the time you hit lategame (level 58), the weapon attachment stages are my go-to resource stage to use my stamina
5. Do 3 runs of pvp daily (unlocks once you reach level 30), once you're max rank (2 months into the game) you only need to do 1 run daily
6. After doing all the previous chores, hit claim all on the daily missions

This game has a sweep feature for farming stages so doing these daily tasks should take 3 minutes maximum out of your day if you press buttons fast enough. Also, whenever there's a 2x reward event for farming stages, the attachment stage is the best to do because it costs the most stamina to enter (30 stamina). Gold stage and the Stock Boost Bar stage are both the second best option (20 stamina)

WEEKLY
-do the weekly boss fight stage 3 times every week (unlocks once you reach level 27). If you can't get a higher score by the end of the week just hit the sweep button
-in the weekly boss fight shop (unlocks once you reach level 27), buy the 1 core and other weekly resources
-Get as far as possible in the Peak Estimation game mode every week (unlocks once you reach level 30)
-buy the 1 black ticket and other resources of your choice from the logistics shop every week

EVERY 2 WEEKS
-beat the 10 "Expansion Drills" stages every 2 weeks (unlocks once you reach level 20)

Monthly
-complete whatever current event is running, main events usually last 3 weeks, login events last around 2-4 weeks
-buy the 5 orange and 5 black tickets from the shop every month (Obtained in Shop→Trading Post→Growth Stack).
-in the weekly boss fight shop (unlocks at lvl 27), buy the 5 black tickets and all the Sabrina fragments every month
-Do the "Military Simulation" PVP every month (unlocks once you reach a certain ranking in the daily pvp). You only need to participate in this 20 times total every month, which can be done in like 2-3 days. Whether you win or lose the battles in the military simulation pvp, it doesn't matter for gem rewards. It's participation that gives you gems.

Picture: The home screen. The weekly "boss fight" mode, the normal pvp mode, the "military simulation" pvp mode, the biweekly "expansion drills" mode, and the weekly "peak estimation" mode are in Resource stages and PVP

GACHA GUIDE

The basic stuff you need to know before rolling in the gacha

1. There are only 3 rolling currencies in this game: Gems, orange tickets and black tickets
2. Use every gem and orange ticket that you obtain on limited banners
3. Save black tickets and use them on the permanent gacha every time you have enough for a 10 roll
4. Never consider using gems or orange tickets on those banners with a permanent T-doll (Tololo, Qiongjiu, Sabrina, Mosin, Vepley or Peritya) or permanent weapon on rateup. They are a scam and are never to be rolled on, and are only there for whales who want an easy start. You as a f2p will obtain all of these permanent T-dolls just from rolling on limited banners and from the permanent gacha as time passes
5. Once you hit 60 rolls on any T-doll gacha without obtaining a high rarity, it's better to start doing single rolls instead of 10 rolls (1 purple rarity T-doll/weapon is guaranteed every 10 pulls, but chances are you'll obtain a high rarity when your pity score is between 60 and 70)

More detailed info on currencies and banners:
-THE TYPES OF ROLL CURRENCIES:
There are only three roll currencies you have to keep track of: Gems, orange tickets and black tickers
-Gems and orange tickets: These two currencies are the same currency, it's just that 150 gems=1 orange ticket. It's recommended to only use these two currencies on limited banners and on nothing else
-Black tickets: this currency can only be used to roll on the permanent gacha. Even though 150 gems=1 black ticket, you should never use gems to obtain black tickets. The permanent gacha should only be rolled with by using black tickets you can obtain without having to spend gems
-There is one more currency in this game called Blue Coins. They can be converted into roll currency, but they're mostly used to obtain paid T-doll costumes. This currency can only be obtained through real life money unfortunately. There was one time the devs gave us 600 as part of a new year's celebration, but that's all f2p's have obtained.

-INFO ON RATE-UP BANNERS
There are only four types of gacha: the beginner's gacha, the permanent gacha, limited rate-up gacha and permanent rate-up gacha

1. Beginner's gacha: This is the first banner you'll roll in as part of your beginner rolls. It's available until you roll 50 times. You only need 8 black tickets to do a 10 roll on this gacha. The high rarity T-dolls on rate-up are Tololo, Qiongjiu, Sabrina, Peritya and Mosin Nagant, and you're guaranteed to obtain one at exactly 50 rolls
2. Permanent gacha: This gacha is available forever and never goes away. This banner has 6 high rarity T-dolls (Tololo, Qiongjiu, Sabrina, Vepley, Peritya and Mosin Nagant) and 6 high rarity weapons (the signature weapons of the 6 T-dolls mentioned before) on rate-up at the same time, each having an equal chance of being the high rarity you get. This gacha has a feature for beginners, where once you've rolled in the permanent gacha 260 times, you can select any of the 6 T-dolls from the permanent gacha and obtain it for free. It should take between 4 to 5 months to get to 260 rolls from the moment you first started assuming you played diligently. You can only roll in this banner with Black tickets and Gems, though it is recommended never to use gems on this, only black tickets.
   Advice: You should roll on the permanent gacha whenever you have enough black tickets for a 10 roll. Never use gems to roll on this gacha, nor convert gems into black tickets. Gems are best spent on limited gacha
   (Note: In the future, the permanent gacha will get a feature where you can select which T-doll or weapon you want the most out of the gacha and increase its droprate to 50%.)
   (Note 2: Units never get added to the permanent gacha. The pool never gets diluted with new T-dolls nor weapons. It'll always be Tololo, Qiongjiu, Mosin Nagant, Sabrina, Vepley and Peritya, plus the low rarities, even a year after the game's release)
3. Limited rate-up gacha: These banners are available when there's an event going on. Usually, there's a new limited unit introduced every 30 or so days and the rate-up lasts 3 weeks. When available, there will be two banners, one with a limited T-doll on rate-up and another banner with the signature weapon of the current limited rate-up T-doll. For both the T-doll and weapon banners, the rate-ups will be a 50% chance to obtain the rate-up limited unit and a 50% chance to obtain one of the 6 permanent units from the permanent gacha. You can only roll on this banner with orange tickets and gems.
   Advice: It's recommended that you save all your gems and orange tickets for these, as limited banners are very important to keep up with the meta. Just look at the current CN tier lists
4. Permanent rate-up gacha: These banners are almost always available. When available, there will be two banners, one with a permanent T-doll on rate-up (either Tololo, Qiongjiu, Sabrina, Vepley, Peritya or Mosin Nagant) and another banner with the signature weapon of the current permanent rate-up T-doll. For both the T-doll and weapon banners, the rate-ups will be a 50% chance to obtain the rate-up permanent unit and a 50% chance to obtain one of the 5 other permanent units from the permanent gacha. You can only roll on this banner with orange tickets and gems.
   Advice: It is recommended to never ever consider rolling on these permanent unit rate-up banners. These banners only have one of the 6 permanent gacha T-dolls or weapons as the rate-up characters, and those are easily obtained through the permanent gacha without having to use roll currency that's better used on limited banners. These rate-up units are also obtainable from getting offbannered in a limited rate-up, which has a 50% chance of happening every single limited banner. Skip out on these types of banners and just use your orange tickets and gems on limited banners instead

Guide to selecting weapons and attachments for your T-dolls

-EARLY TO MID GAME WEAPON AND ATTACHMENT GUIDE:
Attachment usage from early game (around lvl 23) up to almost max level (level 57) is really easy. There is a big variety in attachments, but you only need to farm 2 kinds of attachments, the Phase strike attachments and the emergency repair attachments. Every single T-doll in the game uses Phase strike, besides Colphne and Ksenia, those two use Emergency Repair
When farming the attachment stages, you can choose what type of weapon attachments will drop before you start the run. Whenever you enter one of the attachment farming stages for AR+SG, SMG+MG, or RF+BLD, make sure to always select the Phase strike attachment that make you deal 15% more damage to enemies who have been "phase debuffed" for all your damage dealing T-dolls, and whenever you farm the attachment stages for HG, select the Emergency Repair attachment that makes medics give +2 stability whenever they heal. For the early game up to near max level, you can ignore farming any other kind of attachment in the game that's not the Phase Strike attachment or the Emergency Repair attachments.

Note about the Phase strike attachments: the Phase debuff attachments lets T-dolls deal +15% extra damage to enemies with "Phase debuffs". There are alot of T-dolls with skills or talents that can inflict these types of debuffs, including:
-T-dolls that can inflict burn-type debuffs (Ksenia v1 with skill 1, Sharkry with skill 1, Qiongjiu with skill 2, Krolik with skill 2 or talent, Cheeta with skill 2)
-T-dolls that can inflict water-type debuffs (Tololo skill 1 with key 2 equipped)
-T-dolls that can inflict electric-type debuffs (Mosin Nagant with all her skills)
-T-dolls that can inflict ice-type debuffs (Suomi with her talent and with her ultimate skill, Lotta with her talent or with key 3 equipped)
-T-dolls that can inflict corrosion-type debuffs (Nagant with skill 1 or 2)

-LATEGAME WEAPON ATTACHMENT GUIDE:
The worst part of this game.
Once you get access to the level 58 attachment farm stages, you're ready for the lategame grind.
There's some stuff you need to know about attachments. Whenever you obtain a gold rarity attachment from the attachment farm stage, it'll have 3 (or if it's the muzzle, 4) of the following stats at random: ATK% bonus, ATK+, DEF% bonus, DEF+, HP% bonus, HP+, CRIT%, CRITDMG%.(only the muzzle can obtain CRITDMG%)
Not only will the 3 type of stats you get be randomized, but the amount of ATK, DEF, HP, Crit rate (and Crit Dmg for the muzzle) that the attachment will have also be random

How much of each stat you can get:
Attack%/Defense%/Health%: 2.6%, 3.0%, 3.4%, 3.8%
Attack+: 17, 19, 21, 23, 24
Defense+: 10, 12, 14, 16
Health+: 38, 43, 48, 53, 54
Critical Hit/Critical Damage: 3.5%, 4.0%, 4.5%, 5.0%

For your damage dealers, whenever you obtain an attachment from the attachment farming stage, you want the stats that you get to be as follows: You want the attachment to have exactly +3.8% ATK bonus, either 23 or 24 ATK+ and either 4.50% or 5.00% CRIT (plus 4.50% or 5% CRITDMG if it's the muzzle since it can have 4 stats). Any other attachment that doesn't have these stats is just trash. For example, if you get an attachment with ATK and CRIT but a defensive stat like DEF or HP, it's garbage. Not only that, even if you do get an attachment with ATK%, ATK+ and CRIT%, if one of the stats is too low (for example, if ATK% is 3.4% or below instead of 3.8%, or if CRIT is 4.00% or lower), the attachment is garbage. Keep doing the same attachment stages until you get all 4 of a weapon's attachments with 3.8% ATK bonus, 23 or 24 ATK+ and 4.50-5.00% CRIT (and 4.50-5.00% CRITDMG for the muzzle). Afterwards, upgrade your attachments to max stats
Note: The only damage dealer in the game that doesn't need ATK%, ATK+ and CRIT% on all 4 attachments is Makiatto. 3 of her attachments do need to be the usual ATK%, ATK+ and CRIT% (and CRIT DMG for the muzzle), but one of the 4 attachments is better with HP% instead of CRIT%. This is because Makiatto already has a natural 60% CRIT chance thanks to her talent, and each attachment usually adds around 10.5%-15% CRIT chance when maxed out, and with 3 attachments having it the CRIT chance becomes 100% or more (60%+15%+15%+15%=105%), and once the CRIT chance becomes 100% or higher on a T-doll, every attack is guaranteed to crit.
This note also sorta applies to Ullrid and Sharkry (vertebrae 4). They both have a 50% CRIT chance and 3 attachments with 15% CRIT make them get to 95%, which isn't 100% but it's close enough. You can also use a common key with 5% CRIT to make it 100%

For your medics it depends. If you want them for healing in tough story missions, you want them to have +3.8% ATK bonus, 23-24 ATK+ and 3.40-3.80% HP bonus (plus 3.4-3.8 DEF% bonus for the muzzle), but if you want them to do more damage for a raid boss, you want them to have the same attachments a damage dealer would have. After getting your attachments, upgrade them to max stats

For your more defense oriented T-dolls, which in this game are only Groza and Sabrina, you want them to have 3.8% HP bonus, 3.5-3.8% DEF bonus, +23-24 HP bonus (and +23-24 DEF for the muzzle). After getting your attachments, upgrade them to max stats
In my viewpoint, there's no content in the lategame that really needs these T-dolls with perfect attachments so you can use any unleveled attachment set on them because tanking damage in the very lategame is unnecessary.

How to upgrade attachments to max stats:
To upgrade attachments, first use a bunch of trash attachments to feed EXP into the attachment until it's 5000/5000 (the quick selection button will help you do that), then hit upgrade button. Afterwards keep doing this but from the second time and onward you should add 3 amplifiers (or if it's the muzzle, 4 amplifiers) to the upgrade, then hit upgrade. Keep doing the upgrade method of using a bunch of trash attachments and 3-4 amplifiers until the attachment is max stat.
Why level up attachments this way? Because whenever you upgrade attachments in this game, the attachment stats will decrease or increase anywhere from -100% to +100%. This means that your attachments can actually downgrade whenever you upgrade attachments. What adding amplifiers to the upgrade does is make the attachment upgrade be between +0% to +100% instead of -100% to +100% so that you don't ever get a negative result

One final piece of info about upgrading attachments is that attachment stats can be upgraded up to 3x the initial value of the stat. So for example, if you got an attachment from the attachment stage with initial stats being 3.8% ATK, 5% CRIT and 24 ATK+, the amount of stats the attachment will give the weapon will be 11.4% ATK, 15% CRIT and 72 ATK+ after it's fully upgraded. Alternatively if the initial stats of an attachment were 3.4% ATK, 4% CRIT and 21 ATK+, the maximum stats that attachment can ever reach is 10.2% ATK, 12% CRIT and 63 ATK+. This is why attachments with subpar initial stats are trash

-BEST WEAPONS AND ATTACHMENTS FOR EACH CHARACTER:
Below is a list of which weapons and attachments are best for each character
Note that every weapon is treated at 0 duplicate copies
Also, during early to mid game, you can ignore the attachment recommendations. It's best just to just place the +15% damage or +2 stability attachments on all your weapons
(Note: This list is heavily based on the following spreadsheet: https://docs.google.com/spreadsheets/d/1DogyU3K7ZXw2qbhP1EhRXIAw5nCyIV5G5e-QWviBZME)
T-dolls available at launch:
-Suomi(Suomi)=
Best weapon: Suomi's Signature weapon (Unspoken Calling)>Lenna's Signature weapon (Not yet released)>Battle Pass SMG(costs irl money)>Suomi
Best Attachment Set: Ultimate Pursuit (Increase damage and shield given by ultimate skill by 5%) in stages where your T-dolls are struggling to survive, Phase Strike (+15% dmg against phase debuffed enemies) in stages where DPS is the bigger focus
-Ullrid=
Best weapon: Ullrid's Signature weapon(Rectrix)>Battle Pass Sword(costs irl money)>Pluma Edge
Best Attachment Set: Ballistic boost (+20% physical dmg)
-Tololo(Ak-Alfa)=
Best weapon: Tololo's Signature weapon (Planeta)>Daiyan's Signature weapon (Not yet released)>Qiongjiu's Signature Weapon (Golden Melody)>Battle Pass AR(costs irl money)>QBZ-191
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Qiongjiu(QBZ-191)=
Best weapon: Qiongjiu's Signature weapon (Golden Melody)>Battle Pass AR(costs irl money)>Tololo's Signature Weapon (Planeta)>Daiyan's Signature Weapon (Not yet released)>QBZ-191
Best Attachment Set: If you're not using skill 2 in battle, use Ballistic boost (+20% physical dmg), otherwise use Phase Strike (+15% dmg against phase debuffed enemies). In the very far future, Fire boost (+20% Fire dmg) is better for when Vector releases
-Sabrina(SPAS-12)=
Best weapon: Sabrina's Signature weapon (Mezzaluna)>Vepley's Signature Weapon (Heart Seeker)>Battle Pass SG(costs irl money)>SPAS-12=Vepr-12
Best Attachment Set: Allay Support (-20% AOE dmg received)
-Vepley=
Best weapon: Vepley's Signature weapon (Heart Seeker)>Sabrina's Signature Weapon (Mezzaluna)>Battle Pass SG(costs irl money)>Vepr-12
Best Attachment Set: Ballistic boost (+20% physical dmg)
-Peritya=
Best weapon: Either Peritya's Signature weapon (Optical Illusion) if you're using her for mob killing or the Battle Pass MG(costs irl money) if you're using her for raid bosses (like guild bosses) once Clukay releases>PKP Pecheneg
Best Attachment Set: Ballistic boost (+20% physical dmg)/Acid boost (+20% Corrosion dmg) is better for when Mechty releases
-Mosin Nagant(Mosin Nagant)=
Best weapon: Mosin Nagant's Signature weapon (Samosek)>Makiatto's Signature weapon>Battle Pass RF(costs irl money)>M1891 Mosin-Nagant
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Groza(OTs-14)=
Best weapon: OTs-14 Groza>Battle Pass AR(costs irl money)>Qiongjiu's Signature Weapon (Golden Melody)>the other AR's
Best Attachment Set: Allay Support (-20% AOE dmg received)
-Colphne=
Best weapon: Battle Pass HG(costs irl money)>Taurus Curve
Best Attachment Set: Emergency Repair (+2 stability recovery)
-Krolik=
Best weapon: Either Ullrid's Signature weapon(Rectrix) for boss stages or Battle Pass Sword(costs irl money) for killing mobs>Either Pluma Edge for boss stages or Prairie Hunter for killing mobs
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Nemesis=
Best weapon: Mosin Nagant's Signature weapon (Samosek)>Makiatto's Signature weapon>Battle Pass RF(costs irl money)>OM50 Nemesis
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Cheeta(MP7)=
Best weapon: Suomi's Signature weapon (Unspoken Calling)>Lenna's Signature weapon (Not yet released)>Battle Pass SMG(costs irl money)>MP7
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Littara(WKp)=
Best weapon: Peritya's Signature weapon (Optical Illusion)>Battle Pass MG(costs irl money)>PKP Pecheneg
Best Attachment Set: Ballistic boost (+20% physical dmg)
-Nagant(M1895)=
Best weapon: Battle Pass HG(costs irl money)>Nagant
Best Attachment Set: Ballistic boost (+20% physical dmg)
-Sharkry=
Best weapon: Tololo's Signature weapon (Planeta)>Daiyan's Signature weapon (Not yet released)>Qiongjiu's Signature Weapon (Golden Melody)>Battle Pass AR(costs irl money)>QBZ-191
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Ksenia(Stechkin)=
Best weapon: Battle Pass HG(costs irl money)>Stechkin
Best Attachment Set: Emergency Repair (+2 stability recovery) if doing normal stages, Phase Strike (+15% dmg) if doing raid bosses
-Lotta=
Best weapon: Vepley's Signature weapon (Heart Seeker)>Battle Pass SG(costs irl money)>Sabrina's Signature Weapon (Mezzaluna)>Lotta's 4 star Weapon
Best Attachment Set: Ice boost (+20% ice dmg)

Future T-dolls:
-Daiyan(Type-95)=
Best weapon: Daiyan's Signature weapon (Not yet released)>Tololo's Signature weapon (Planeta)>Qiongjiu's Signature Weapon (Golden Melody)>Battle Pass AR(costs irl money)>QBZ-95>QBZ-191
Best Attachment Set: Ballistic boost (+20% physical dmg)
-Centaureissi(G36)=
Best weapon: Centaureissi's Signature weapon (Not yet released)>Battle Pass AR(costs irl money)>Qiongjiu's Signature Weapon (Golden Melody)>Tololo's Signature Weapon (Planeta)=Daiyan's Signature Weapon (Not yet released)>G36
Best Attachment Set: Emergency Repair (+2 stability recovery) if doing normal stages, Phase Strike (+15% dmg) if doing raid bosses
-Lenna(UMP9)=
Best weapon: Lenna's Signature weapon (Not yet released)>Battle Pass SMG(costs irl money)>UMP9
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Jiangyu(Type-97)=
Best weapon: Jiangyu's Signature weapon (Not yet released)>Battle Pass AR(costs irl money)>Qiongjiu's Signature weapon (Golden Melody)>Tololo's Signature Weapon (Planeta)>Daiyan's Signature Weapon (Not yet released)>QBZ-97>QBZ-191
Best Attachment Set: Phase Strike (+15% dmg against phase debuffed enemies)
-Makiatto(WA-2000)=
Best weapon: Makiatto's Signature weapon (Not yet released)>Mosin Nagant's Signature weapon (Samosek)>Battle Pass RF(costs irl money)>WA2000=Mosin Nagant
Best Attachment Set: Ice boost (+20% ice dmg)

Mental Integration Shop Guide

This shop can be accessed through Shop→Trading Post→Neural Integration
Everytime you roll in the gacha, you get currency that can be used in this shop
When you're finally able to buy your first gold rarity gun from the shop using 900 currency:
-If you own Tololo, you should buy Tololo's signature weapon (Planeta) as your first gold rarity weapon. Tololo's weapon is the best weapon available for Tololo and Sharkry, and it's pretty good on Daiyan
-If you don't own Tololo but own Qiongjiu, you should buy Qiongjiu's signature weapon (Golden Melody) instead. Qiongjiu's weapon is the best weapon available for Qiongjiu, and it's pretty good on Jiangyu and Sharkry
-You CAN buy the other gold weapons, but in terms of CN meta, both Tololo's and Qiongjiu's weapon are the weapons that age the best out of the shop gold weapons (Qiongjiu's weapon for Qiongjiu, Tololo's weapon for Sharkry or Clukay)
-You can also simply choose not to buy a gold weapon at all and try to make-do with the purple rarity weapons. A weapon costs about 30 rolls worth of roll currency that could've gone into a limited banner, after all.

After getting your first weapon you're done buying weapons in the weapons shop. It's best to spend the rest of the shop currency you obtain on orange tickets and cores, and instead of buying the other weapons, it's best to try to obtain the other shop weapons from the permanent gacha
Eventually, the permanent gacha will get a feature where you can get the weapon you want on 50% rate-up, so you'll eventually obtain the other weapons in the long term

Pictured above: the weapons shop. The feature where you can buy rolls and cores with this currency won't be available in global for a long while, but it'll eventually be available. Also, Lotta eventually gets added to this shop for people who missed the Ullrid/Suomi event

Guide to T-Doll Skill Upgrades

-Ever played a gacha game, and there's this resource that you're always low on for some reason, that can't be infinitely farmed and is only available from events and maybe logins? In this game, that resource is called "core". They're used to obtain "fixed keys" which is just this game's name for skill upgrades that can be equipped/unequipped before battle. High rarity T-dolls require you to use 3 cores per fixed key, and they have a total of 6 fixed keys to unlock, so high rarity T-dolls require 18 cores to be maxed out on all skills. Low rarity T-dolls require you to use 1 core for the first four fixed keys but 2 cores for keys 5 and 6, and they have a total of 6 fixed keys to unlock, so low rarity T-dolls require 8 cores to be maxed out on all skills. Also, for all T-dolls in the game, once you max out all 6 of their skills you unlock a "common key" which can be equipped to any T-doll and usually has a special effect.
Cores are obtainable from the following:
-Main events (6-12 cores every month)
-Side events (usually anywhere from 3-6 cores every month)
-Weekly boss fight shop (1 core every week, so 4 every month)
-Battle pass (3 every month)
-Military simulation PVP (1 every month)
-Sunborn website login (1 every month) (CN ONLY FEATURE)
-Mental Integration Shop (3 every month) (CN ONLY FEATURE)
-Daily free gift pack (Once every 41 days guaranteed, less days than that with good RNG)
-First time rewards from clearing the weekly bosses
-First time clear rewards from the conductor farming stages (60 cores in total)
-You can also obtain more cores with real life money.
-From mails if there's a special anniversary celebration or from apology mails if the devs fucked up REALLY hard

Pictured above: Cores. A very important resource that you can misuse very easily and very early in the game. Plan your core usage in the long term!

Anyways, this game doesn't really give you alot of cores monthly, so you will have to get used to being always permanently low on this resource. It's stupidly easy to enter core hell because the game doesn't give you enough cores to keep up with the amount of T-dolls they release monthly. You have to be careful on where you spend your cores because you run out of cores so fucking fast in this game. Every single core that you misuse on a (metawise) bad T-doll or on a wrong skill is a permanent mistake you can't take back that will slow down your ability to beat stronger stages. This following section is my list of recommendations of which keys you should prioritize obtaining using cores, so that you have an easier time with the game and don't regret misusing cores for the long term:

My recommendation on which T-doll's keys to use cores on:
T-dolls available at launch:
-Suomi(Suomi)=Key 1 (Gain +2 stability gauge if skill 1 reduces enemy stability to 0), key 2 (+3 confectance index), Key 5 (provide an ally shield and 1 confectance index to them if they're below 80% HP), Key 6 (restore 1 stability and 10% hp) requires 12 cores total
-Ullrid=Key 1 (Gain extra action after using skill 2 at the cost of 2 confectance index), key 2 (attacks ignore 30% DEF), key 3 (+3 confectance index), requires 9 cores total
-Tololo(Ak-Alfa)=Obtain all 6 of her keys, requires 18 cores total. Prioritize obtaining key 3 (ATK+damage increase) and key 4 (skill 2 stuns when paired with a prior support attack) first and then the other keys
-Qiongjiu(QBZ-191)=Obtain all 6 of her keys, requires 18 cores total. Prioritize obtaining key 3 (Defense down II) first and then the other keys
-Sabrina(SPAS-12)=Obtain key 2 (+3 confectance index) and key 4 (+2 stability gain per confectance index gained). Requires 6 keys total
-Vepley=Obtain all 6 of her keys, requires 18 cores total. Prioritize obtaining key 1 (+2 stability damage dealt) and key 3 (-60% damage received) first and then the other keys
-Peritya=none, not worth using
-Mosin Nagant(Mosin Nagant)=Obtain key 2 (skill 1 applies paralysis if used after skill 2) and key 6 (gain 3 extra movement after applying paralysis)
-Groza(OTs-14)=none, works fine without keys
-Colphne=Obtain key 3 (skill 2 now AOE heals), requires 1 cores total
-Krolik=none, not worth using
-Nemesis= Obtain key 1 (Defense down II), requires 1 core total
-Cheeta(MP7)=none, not worth using
-Littara(WKp)=none, not worth using
-Nagant(M1895)=none, not worth using
-Sharkry=Obtain all 6 of her keys, requires 8 cores total. Prioritize both key 1 (+3 confectance index) and key 2 (deal damage when an enemy gets Overburn) first and then the other keys
-Ksenia(Stechkin)=Obtain key 4 (receive skill 2's buffs), requires 1 cores total
-Lotta=Key 1 (+3 confectance index), requires 1 core total

Future T-dolls:
-Daiyan(Type-95)=Obtain all 6 of her keys, requires 18 cores total. Prioritize obtaining key 4 (gain 1 calibration) first and then the other keys. Requires 18 cores total
-Centaureissi(G36)=Obtain key 3 (thermal recovery trigger removes 2 debuffs), key 4 (skill 2 heals by 75% more), key 5 (debuff removal). Requires 9 cores total
-Lenna(UMP9)=Obtain all 6 of her keys, requires 18 cores total. Key 4 and 5 are her more essential keys, but I recommend using 18 cores on her the moment you obtain her for her common key (incredibly overpowered)
-Jiangyu(Type-97)=None, not worth using. However, if you for whatever reason value her usefulness in PVP (a game mode that doesn't matter): Key 1 (+3 confectance index), requires 3 cores
-Makiatto(WA-2000)=Key 2 (+3 confectance index), key 3 (gain "lone wolf" buff), key 5 (highest hp enemy gets "cold blooded instinct" debuff), key 6 (ATK +10%). Requires 12 cores total. In the far future, once the guild feature comes out, it's recommended to obtain all her keys for the ATK bonus

devs.. please... just some more cores...

TIER LISTS

Notes:
-Vertebrae copies of high rarity T-dolls not taken into account.
-Every T-doll in the game except limited T-dolls and Lotta can appear to you while rolling
-In the CN version, the order in which the limiteds were released was Daiyan→Centaureissi→Lenna→Jiangyu→Makiatto→Ullrid→Suomi. However, in the global release, the first two limited T-dolls are Suomi and Ullrid, and the limited that released a month after is Makiatto. The rest have unknown release dates.
-Teambuilding: Every team comprises of 1 healer T-doll (Either Suomi, Colphne, Ksenia or Cheeta at release, plus Centaureissi in the future) and any 3 other T-dolls. The other 3 T-dolls are of your choice, but the tier list on the left should help you decide what to use when you're new (your first month of playing)

-The list on the left is based on who you should prioritize raising. The higher a T-doll is on the left list, the easier they'll make the game for you
-The list on the right is based on who you should save your rolling currency for. Just because a T-doll is low on the list on the right doesn't mean they're bad, just that they're incredibly easy to obtain

"SHOULD YOU ROLL" TIER LIST EXPLANATION AND EVALUATION OF ALL T-DOLLS

1. Tier 1: THE T-DOLL YOU MUST ROLL: Suomi (Suomi).
   -She will be the first limited T-doll in the global release alongside Ullrid.. She's a medic, like Colphne or Ksenia. Her main appeal is being able to provide shields to all allies with her ultimate skill. These shields prevent that T-doll from taking any damage, making most battles a cakewalk since you don't have to worry about survival while these shields are up. You can consider all your allies near immortal from these shields and Suomi can use her ultimate skill every 3 turns. She's the ultimate defensive T-doll. Not just that, from an offensive viewpoint, Suomi can increase the damage of your ally T-dolls by various ways. She has the ability to provide ice-type weakness to enemies with her ultimate skill, which greatly helps her own damage and stability breaking with skill 1, and also helps future ice-type damage dealers like Makiatto and Dushevnaya deal more damage and remove stability better than before. Aside from helping ice-type damage dealers, she can give a Crit DMG boost to any ally that deals a single target attack twice per turn with her talent, and Suomi can also apply a phase debuff with her talent to trigger the 15% damage boost from the Phase strike attachment set. She's the best medic in the game already due to her damage prevention on all allies, but she's also very good at aiding ice-type damage dealers which will help you during tough battles and boss stages, and her Crit DMG boost from her talent can be applied to any T-doll that deals single target damage. Overall, she's a very good and versatile T-doll. She's easy enough to use and can be brought to any battle blind for ez mode. In most CN player's opinions, she's a must roll character. If I had to give a weakness to her, is that she isn't as good at stability healing as a medic like Colphne, and she can only remove debuffs from allies with her ultimate skill which can only be activated every 2-3 turns, meanwhile every other medic can debuff allies every single turn with the right keys.
2. Tier 2: You would be dumb not to roll for these characters: Daiyan (Type-95)
   -Daiyan: She is a godsend for dealing with enemies from far away. She has nice damage, can damage any enemy unit that tries to do a single target attack on her, but her most important asset is her ridiculously high movement speed. She has 9 movement speed at base, and has two different keys that increase her movement speed by 1, making her total movement speed 11. For comparison, Krolik and Ullrid have the second highest movement at 9 movement speed, and Vepley has 8 movement speed. Daiyan can easily move behind enemies and attack them from behind their covers. Not only that, but she also has the ability to do an extra movement after doing an attack, making her be able to move again to retreat farther away from the enemy she just attacked. Daiyan's insane movement speed also means she can move from one side of the map to the very other end of the map easily. If I had to give Daiyan a weakness, is that she doesn't have super high damage compared to the two best damage dealers in the game (Qiongjiu and Tololo), though her damage is very close to them. Regardless of spreadsheet damage, her high movement speed allows her to deal damage to enemies that nobody else can reach and retreat afterwards, plus further damage any enemy that tries to attack her.. Very versatile unit, can be brought to any battle blind.
   -Lenna: She is a godsend for mob clearing and stunning enemy units, a true master of crowd control. In stages with low amount of normal enemies and a boss immune to stun debuffs, she gets outshined by other T-dolls, but on stages with alot of stunnable mobs she's the best at her job, an invaluable T-doll to have. Worth noting, that she's also worth rolling for her common key that you unlock once you use 18 cores on her. Can be brought in most battles blind

3. Tier 3: Good to roll: Ullrid, Lenna (UMP9) and Makiatto (WA-2000).
   -Ullrid: Ullrid will be the first limited T-doll in the global release alongside Suomi. Her kit is built around several ups and downs. To start, she has a very high movement speed of 9 tiles which is tied with Krolik as the T-doll with the highest movement speed at the game's release. Unfortunately, her movement speed doesn't mean anything because her range on her first two skills is terrible, only being able to attack enemies who are directly next to her. It's only her normal attack and her ultimate skill that have any range, her normal skill never being worth using and her ultimate skill having a cooldown of 3 turns. When using Ullrid, you always have to keep in that unlike every other T-doll in the game besides Krolik, you're going to have to walk up to the enemy and attack them instead of shooting them from afar. Thankfully, after using any of her skills, she gains 6 tiles of extra movement to be able to retreat under a cover to avoid enemy damage. Not just that, her ultimate skill gives her camouflage, which makes enemies target other T-dolls for attacks instead of her. Being able to retreat after attacking and having camo after her ultimate skill are both great for Ullrid's survival, and pretty much negates the downside of having to walk up to enemies to attack them.. Ullrid also has good damage, not as high as Tololo's nor Qiongjiu's of course but not that much below them, assuming Ullrid has a gold rarity weapon. One of Ullrid's problems regarding damage is that she sucks at removing stability from the enemies. Her skills only deal about 1 or 2 stability per use. In some turns with full confectance gauge she can attack 3 times, but that's about 6 stability damage to an enemy at her best. Another big problem she has is that there's no way to obtain a high rarity weapon for her without either spending gems and orange tickets for her limited gacha sword or spending real life money to obtain the battle pass sword for her. For comparison, every other good damage dealer in the game is a AR, RF or SG wielding T-doll, and you can obtain gold rarity AR's, RF's and SG's off the permanent gacha or in the weapons shop, however there's no gold rarity sword available to the player in neither the permanent gacha nor the weapon's shop, so unless you throw rolls trying to get her gold rarity sword from the limited gacha or spend money on the battle pass sword, Ullrid is stuck using her purple rarity weapon forever, which severely hinders both her damage and confectance index gain. Despite these flaws, she's still a decently strong T-doll who deals good damage, and the more single target damage dealers you own the better, so she's not bad to roll for at all, just not super good.
   -Lenna: She is a godsend for mob clearing and stunning enemy units, a true master of crowd control. In stages with low amount of normal enemies and a boss immune to stun debuffs, she gets outshined by other T-dolls, but on stages with alot of stunnable mobs she's the best at her job, an invaluable T-doll to have. Worth noting, that she's also worth rolling for her common key that you unlock once you use 18 cores on her. Can be brought in most battles blind
   -Makiatto: She deals nice damage and has defensive options in case there's too much incoming damage from enemies. Her damage isn't super high like Tololo or Qiongjiu, but it isn't worth dismissing either, since she has a huge range, deals ice damage and has other defensive features they don't have. If you own Suomi though, her attacks are greatly boosted, because Suomi can apply Ice weakness to enemies and can also inflict the Solidification and Chill debuffs, which help Makiatto's talent. Not only that, but Suomi can also raise Makiatto Crit DMG every turn. Also worth noting, Makiatto with 1 vertebrae copy obtained is one of the best damage dealers in the game, in the same level or higher than Qiongjiu and Tololo (Tier 1 in any strength tier list) without even considering Suomi's damage boosts, so alot of CN players recommend to roll for her twice.

   Tier 3.5: Maybe worth rolling: The limited weapons in the game.
   They're usually only a very small damage boost compared to the weapons available in permanent gacha and require a large amount of orange tickets or gems that could be better spent on a new limited T-doll or even a vertebrae of a T-doll. Not worth it. The only exception for this is Ullrid's sword, since there's no permanent gacha equivalent of it.

4. Tier 4: Underpowered: Centaureissi (G36) and Jiangyu (Type-97).
   -Centaureissi: She's not bad, she just doesn't have as much strengths as the other medics. Her first issue regarding gameplay is that she can't raise the damage of ally T-dolls like all other medics can. For comparison, Suomi can inflict ice weakness onto enemies, can give CRIT DMG buffs to allies, plus is really good at inflicting phase type debuffs to enemies before your damage dealers attack with her talent. Ksenia and Cheeta can give allies the Blazing assault II buff (+15% atk for 2 turns), and Colphne can give Attack up I (+10% atk for 2 turns). Compared to all other medics in the game, Centaureissi has 0 damage buffs for any ally. Her second issue is that she has poor skill cooldowns. Her ultimate skill takes minumum 3 turns to charge up, assuming she can deal 2 support attacks every turn, which isn't the case in every battle. Her skill 1 has a cooldown of 1 turn, which isn't bad, but her skill 2 has a cooldown of 2 turns. There are some turns where Centaureissi is just stuck using her normal attack on enemies because her 2 skills and her ultimate skill are all stuck on cooldown, and on these turns she can't heal at all. She does however try to make up her weaknesses with some strengths, like having access to map wide AOE healing with her ultimate skill and the best ally debuffing skills in the game, but all other medics also have their options to remove debuffs from allies, plus there's no content in the game that requires debuffing as good as Centaureissi can offer. Centaureissi is also really good with healing allies who are far away from her. This makes her really good in comparison to a medic like Ksenia who is only able to heal allies who are close to her, but unfortunately all other medics besides Ksenia can heal allies outside their range. The final and strongest nail in Centaureissi's coffin is simply the fact that Suomi and her shields exist. Suomi is an incredibly overpowered and versatile medic and her shields do god's work in preventing damage. It doesn't matter how good Centaureissi's or any medic's healing. Suomi really does just blow every single medic out of the water in this game, thus rendering Centaureissi's strengths in healing completely invalid. Ultimately, there's no need to roll for Centaureissi because Suomi's shields invalidate each and every one of Centaureissi's strengths in healing, and because Centaureissi is the only medic in the game who can't give damage buffs to allies. She's not bad or unusable or anything, just not necessary to roll for when you own Suomi, Ksenia, Colphne and even Cheeta
   -Jiangyu: She has alot of issues. Jiangyu requires you to bring someone alongside her who can apply electric debuffs to enemies before Jiangyu attacks, otherwise she really sucks. Her best teammate by default is either Lenna or a T-doll with Lenna's common key for this reason, but even with either of those in the same team, Jiangyu doesn't go from bad to good, she goes from complete trash to decent at best. To make a list of problems: Jiangyu has a pathetic amount of confectance index gain to activate her passive skill which is what her kit is centered on, her passive skill is very RNG based which makes you have to restart stages to get better RNG every time you use her since it only has a 50% chance of stunning an enemy, she has some really terrible cooldowns on her skills, sometimes you're stuck using her normal attack because all her skills are on cooldown, her ultimate skill has an awkward range and doesn't even guarantee her passive skill to stun because it only works for normal attacks. She just has too many downsides. But as long as you keep in mind that Jiangyu doesn't work well without owning Lenna who fixes most of these things, she's usable, though, even with Lenna working as Jiangyu's training wheels she is still not worth bringing to battles over other characters because Lenna can't fix everything in Jiangyu's kit. However one good thing about Jiangyu is her usefulness in the PVP game mode. She is rather tough to deal with for the opposing player in PVP. Unfortunately, PVP as a game mode is a joke. It has no gem rewards you can't get by not winning, so despite her being good in PVP, it doesn't really matter because PVP doesn't really give resources by winning. Not only that, around 4-6 months after Jiangyu's release a tier 0 character Clukay will appear that makes PVP a total cakewalk. Overall, Jiangyu is easily considered the worst or second worst high rarity T-doll in the entire game, and she doesn't age well with time either.

5. Tier 5: Not worth rolling: All high rarity permanent T-dolls and weapons. The list of high rarity permanent T-dolls is Tololo, Qiongjiu, Sabrina, Mosin Nagant, Vepley and Peritya. They're at the bottom of this list because it's not worth rolling for their rate-up banners since these T-dolls will all either spook you when rolling for limited T-dolls or they will be obtained over time from the permanent gacha. However, in terms of performance and how worth they are to raise:
   -TIER 1: THE BEST TWO T-DOLLS IN THE GAME: Tololo (Ak-Alfa) and Qiongjiu (QBZ-191). They both simply deal the highest single target damage numbers to enemies per turn. Very recommended to reroll for them if you can since they're good from the start all the way to the endgame. They also have little to no issues gameplaywise.
   -Tier 2: Pretty good T-dolls: Sabrina(SPAS-12), Mosin Nagant and Vepley.
   Sabrina is the higher rarity version of Groza. Tanks hard, gives all allies more survivability, and hits enemies with movement speed debuffs. Like Groza however, she lacks damage due to being a more defensive T-doll. Not very good at the start, but once you're level 30+ and you're starting to upgrade your T-doll's skills and decide to obtain her key 2 and her key 4, she becomes the T-doll you need to survive the attacks from the weekly boss stage and other harsh stages where you're struggling to survive. She's good the first couple of months of the game's release, but after many months of the game we obtain T-dolls that are so good at damaging enemies that it's better to focus on damage rather than survivability, so it's not recommended to invest too many cores into her. Also note that Sabrina is obtained for free 2 months into the game by buying her fragments through the weekly boss shop
   Mosin Nagant is good, she has the ability to stun the enemy units that she attacks every turn with her key 2 equipped while dealing good single target damage. On boss enemies that are non stunnable however some of her strength goes away, but she can still deal some good single target damage to the boss and help pick off and stun the annoying mobs.
   Vepley is the AOE damage dealer of this game. Needed in situations where AOE damage is needed, like in the gold farm stages or in certain battles where one of the missions is "kill 3+ enemies at the same time" in order to finish the stage with 3 stars. Not just that, she is also worth leveling for the weekly boss stages, due to a certain boss that NEEDS to be debuffed with movement down debuffs and has a dumb "Ultimatum" minigame that requires a character with alot of movement and optimally access to AOE damage. Vepley has high movement and is one of the 3 T-dolls in the game with access to movement down debuffs, and she's also the only good AOE T-doll in the game besides Lotta, which makes her perfect for the lategame weekly boss stages. Worth raising and fully upgrading her by the time you hit endgame due to the facts that you definitely won't beat the final gold farm stages without Vepley, the lategame weekly bosses become much easier, and the fact that fully upgrading her gives you Vepley's common key which is amongst the best keys in the game. She's also a free reward T-doll so every account gets her for free once they get to chapter 3 in story. In the far future we get access to more AOE focused T-dolls, but it takes like 8+ months for those T-dolls to arrive to the game, so for a day 1 you are getting extreme amounts of value from Vepley in the long term because besides Lotta there is no other worthwhile AOE damage dealer until then. The only issue with Vepley is her power level, most of the time the stages in the game are more easily done with the tier 1 characters rather than a niche character like Vepley.
   -Garbage tier: The worst high rarity T-doll in the game: Peritya. She's an AOE damage dealer. That's all she is, she has nothing in her kit except doing AOE damage. Doesn't really debuff the enemy with anything, no movement down debuffs like Sabrina or Vepley, no damage recieved+ debuffs like Vepley or Defense down II debuffs like Qiongjiu, Nemesis, or Litarra nor does she give buffs to any of your allies. The problem with Peritya is that she's a T-doll that can only do AOE damage, nothing else. She has zero utility and is focused purely on AOE damage in a game where single target damage is far more useful. Also doesn't help that her range for her ultimate skill can be awkward at times compared to Vepley or Lotta since its range is dependant of where Peritya is currently standing and works on a wierd 2x2 range. Worth raising during the endgame (6+ months playing) if you have alot of resources and absolutely nothing else worth spending on, otherwise you can just leave her at level 15. She becomes tier 1 or tier 2 10 months into the game's release though, once Clukay releases

   Also Tier 5: DEFINITELY never worth rolling: All low rarity T-dolls and low rarity weapons. You obtain all of these just by rolling for high rarities in general which is why they're the lowest T-dolls to prioritize rolling in this list. But if you want to know how good they are gameplaywise:
   -Absolutely necessary to raise: Colphne and Ksenia. There are only 3 medics (4 including Suomi) in the game and you need 3 medics to bring to the lategame weekly boss fight stages, so these two are must raise T-dolls, no question about it. You should switch between these two depending from stage to stage. If there's more need for healing, use Colphne, but if there's less of a need for healing and more need to deal more damage, use Ksenia.
   -Very good: Nemesis and Lotta.
   Nemesis is a good T-doll from early game all the way to lategame. She has the ability to deal good damage and can apply the defense down II debuff to 1 enemy every turn. The only T-dolls in the game that can apply Defense down II are Qiongjiu and Nemesis (and Littara but she isn't good), and it's a very powerful debuff because it raises both their own damage and their teammate's damage against a single enemy. She is also very cheap to raise for hard stages, only really requiring 1 core to obtain her Defense Down II key and not needing anything else to be good. Has a major weakness though, that being her terrible movement speed that can make her unusable in some large stages (though Daiyan's common key can alleviate this slightly). Another weakness she has is exclusive to the weekly boss stages, her "Prophecy of Mourning" debuff will hit the box that the boss will spawn instead of another enemy, though this is not a big weakness since Nemesis will still debuff the boss
   Lotta is also a good T-doll from early game all the way to lategame. She's incredibly useful for the Gold Farm stages, and is also good for story content. Her event gives you Lotta and many vertebrae copies of her, plus her 4 star signature weapon. When there are stages with enemies very close to each other, Lotta (and Vepley) will help you get rid of those enemies en masse.
   -Worth raising: Sharkry and Groza
   Sharkry: Sharkry is a T-doll to be used from midgame to lategame. Her entire kit is centered around the "Overburn" debuff. With her key 2, she can attack up to 4 times per turn with the right allies. Her ideal allies are T-dolls that can inflict "Overburn", which are Qiongjiu and Ksenia (with vertebrae 1). Once you have Qiongjiu and Ksenia (with vertebrae 1) she can rip through the stability of bosses and deal good damage to them. For new players, just keep in mind that Sharkry isn't a good T-doll until you obtain Ksenia with her first vertebrae, so if you don't have this, you should just leave Sharkry at level 1.
   Groza: Groza is a T-doll that works all the way from early game up to end-game (or until you obtain Sabrina). She's designed to tank enemy hits and increase your team's survivability while also dealing movement down debuffs to enemies. She's great for survivability whenever your medics just can't handle all the enemy pressure, only problems are that she has very low damage due to being focused on defense and survivability for your team, and that she eventually gets replaced when you obtain and raise Sabrina. Still very worth raising with exp though, just not worth using cores on
   -Not worth raising: Littara, Nagant, Cheeta and Krolik
   Cheeta is an interesting T-doll with alot of ups and downs to consider. She can apply the most buffs to allies compared to all other medics, however, those buffs that she gives to allies only last 2 turns on a 4 turn cooldown, so she'll be buffing allies only half the time that she's on the stage, and her buffs only work on allies that are close to her (within a 6 tile radius of her), so you can't use her to buff allies from far away like Colphne or Ksenia can. Also, those buffs that she gives are RNG dependant which makes you have to restart stages for better rng whenever you're using Cheeta, as some buffs she gives can be either really good (like Movement Increase I, or the buffs that increase single target damage) or really useless (the buffs that boost AOE damage or the ones that provide defense in situations where you would rather have damage buffs). Cheeta's ideal scenario is one where all allies are close together, stability recovery isn't important, the cooldown of her ultimate doesn't affect you too much and where you are having fun resetting the stage over and over so that she actually gives the good buffs from her RNG dependant ultimate skill. Ultimately, she is not the worst medic in terms of not being more effective to win stages, but she is the worst medic in terms of ease of usage and in versatility, as dealing with RNG is annoying, the lack of stability heal can get your allies killed in some battles, and the limited range of her buffing and healing can make her less efficient than other medics in most stages where your T-dolls must move away from each other. She's a better T-doll for more advanced players doing either challenge runs like either doing low rarity challenges or just players who are trying to max out damage by trying to get the best RNG results with Cheeta, but for your average player, you can skip out on her and just use Suomi, Colphne and Ksenia for more simplified results.
   Nagant is also a bit special. She has the capability of stunning up to 2 enemy units per turn with either Qiongjiu or Nemesis once she has her vertebrae 6, but the damage she does is still too low to be worth using. Stalling enemies with her is neat, but there's a timer on every stage so stalling enemies instead of focusing on killing them isn't really a good idea on stages where you need to kill every enemy. Besides, if you are a day 1 player, you will likely have Lenna before you even have Nagant at vertebrae 6, making Nagant worthless since Lenna and even Jiangyu are just that much better at stunning enemy units.
   Littara is a T-doll that can apply the Defense Down II debuff to a large amount of units. She can also instead apply the Vulnerability I debuff. Unfortunately, she is an AOE unit that deals little to no damage. Not worth using her over Nemesis or Qiongjiu
   As for Krolik, she suffers from having little to no damage in her skills and poor cooldowns, and nothing else to make up for her own flaws. The best and maybe the only good thing that Krolik can do is apply the Overburn debuff to enemies to trigger Sharkry's support attacks and confectance gain. That's not worth it.

OTHER GUIDES

Spreadsheet containing all T-dolls and weapons in English, plus short guides for each T-doll. I based my list of recommended weapons and attachments on this spreadsheet. It's barely being updated anymore and alot of information in it is wrong, but it was of great help in the early days of playing
https://docs.google.com/spreadsheets/d/1DogyU3K7ZXw2qbhP1EhRXIAw5nCyIV5G5e-QWviBZME/

GIFT GUIDE
https://files.catbox.moe/d0o91y.png
https://files.catbox.moe/ysfhke.jpg
I have no idea who made these guides for which gifts to give to which dolls, but thanks

CN wiki (use machine translation to read from here if you can't speak chinese)
https://gf2.mcc.wiki/

ReTempest, a guidemaker from the CN server. Probably has better tier lists than mine. Also has a bilibili (use MTL because it's in chinese)
https://gf2-bbs.sunborngame.com/user?id=11456
ReTempest's most recent CN guide to all T-dolls (recommended weapons, attachments, synergies, etc)
https://www.7723.cn/strategy/379330.html

Random CN guide I found online (use MTL because it's in chinese)
https://forum.gamer.com.tw/Co.php?bsn=70502&sn=335

Also don't trust the prydw*n tier list