>Note. This is all Atë's personal opinion and interpretation of reality. This should not be taken as objective fact.

Now, to oversimplify excessively, there are essentially five types of contributors:

The first is the simplest: fleshy desires. This is your body– because your body is a part of yourself– communicating back to your brain about this or that. Pain is bad, food is tasty, thirst needs to be quenched, et cetera. You’ll notice that there aren't that many of these, but!- just changing one or two can completely alter everything, but essentially only in the short term. Rather than a part of the primary structure of the soul, you could consider the base desires of a person to be a sort of... stance that the soul takes in one situation or another. Crucially, since your soul is designed to do this, you can fiddle with these parts as much as you’d like without seriously damaging the entire soul. This is how most of the system’s mind control works, and it's how I do most of my best stuff too.

Now, the second type are memories. Humans are ultimately creatures of learning and habit. In the same way that your body will instinctively react negatively to stimuli it has a bad experience with, the soul too will tend towards things it knows are good and avert itself from things it knows are bad. Fond memories with a person you like will make you more likely to do things for them that you'd never even consider doing for an identical stranger. These too are built to change, to be added or subtracted as most memories are truly stored within the brain. The pieces in the soul are more like the director's notes– what you feel about what happened and how it altered and swayed you more than the literal actions of the event. Sometimes, these pieces will remain in place even after the memory itself disappears: Ciotti knows more about this than I would.

Third are values. Ideals of what is right or wrong, value statements about things you approve and disapprove of, and your vision for what a person is supposed to be. This is the most straightforward, but also one of the most dangerous to fiddle with. Values, more than anything else, feed into and are wired as a crucial part of not only the actions taken in the present, but also any and all actions taken in the past. Even if done by mortal means, but especially if done supernaturally, modifications to values are among the most likely to cause a full-on psychotic break. That said, it is possible to deal with this in a delicate enough manner to keep everything in place.

Fourth and perhaps most simply are preferences. Do you prefer red or blue? Sweet or savory? These are different from values since they don't bear nearly so severe a moral implication: if one day you decided you preferred ham over roast beef, you wouldn't have a mental breakdown, you'd simply guiltlessly pick a new thing to put in your sandwich. That said, when messing around with these, you still risk a total collapse. After all, congruity is key: usually these sorts of things change through a natural process, usually as a consequence of reconstruction rather than a spontaneous alteration. In other words, even if it seems insignificant, you could accidentally start a cascade that shatters the whole structure since direct changes here were never supposed to happen.

Fifth and least understood, at least by me, is self image. You'd think this would be included in the rest, but it isn't. It's almost impossible to identify what's important enough here to cause problems, and any substantial alteration to this will almost inevitably cause severe changes to a person's psyche at best and an inevitable collapse at worst. Even if you try to change everything about a person, you need to maintain enough plausibility to stop them from succumbing to true ego death. If a person doesn't have an ego, it means they can't muster <Impetus>. This is tantamount to total oblivion.

Of course nothing is this simple and almost every aspect of a person contains multiple or sometimes even every single one of the listed possibilities. <Ordinance>, and anything like it, is an exceptionally dangerous technique and (even ignoring the moral implications) should never, EVER be used on anyone you care even vaguely about.