I'm a very casual yumeshipper, and mainly talk about the bolded characters. If in doubt, I'm sharing!

Mirror — Sharing :
Albedo , March 7th

Sharing :
Sua , Kel , Venti

Familial :
Tohru Adachi , Yanqing , Futaba Sakura

Unclassified :
Medicine Pocket , Yu Narukami , Marsha