Shiori Usami/Relationships

Osamu Mikumo
Usami is constantly shown to care for Osamu and helps him out with both planning and executing his rank war strategies.

Yūma Kuga
She seems to cares for him.

Chika Amatori
Usami likes pampering Chika, and always helps her during rank wars.

Reiji Kizaki
they seemingly have a good relationship and can understand each other.

Yōsuke Yoneya
They are cousins. They seem to have a really good relationship, as Yōsuke was seen taking care of Yōtarō on Usami's behalf.

Kazama Squad
Usami maintains good relations with her former squad, though she is annoyed by Kikuchihara's blunt nature.

Arashiyama Squad
They seemingly have a good relationship based off Ayatsuji's comment.