A cut to the face is harsh as hell for someone like Kosuzu…That’s one of her main weapons!
Ryuu should have let her leave once Takuma was out of danger. It’s not like he can protect her from his aunt, so he should let her handle it with her own intuition instead of insisting she display the hardheaded ideals of “not running away” that he values
It ends up feeling like she gets hurt just because she wants to keep his good estimation. And he wants her to keep acting in ways that don’t change his view of her or the pedestal he puts her on
Tei is the kind of person who can live up to Ryuu’s ideals, but I think Kosuzu is a little more fragile inside and needs someone who will let her be weak sometimes…