Yuu Kunichika/Relationships

Kei Tachikawa
They seem to have a good relationship, as they're seen playing video games together when Osamu visits Tachikawa Squad's Operation Room. Tachikawa described her as the moon behind the three swords in Tachikawa Squad's emblem.

Kōhei Izumi
They appear to be on decent terms, as she has been described as very helpful by Izumi.

Takeru Yuiga
Unlike Tachikawa and Izumi, she doesn't bully Yuiga. He turns to her when he feels ostracized, which means she might be lenient towards him.