Tsukiyomi Risu is a sadistic, cruel, smart, and evil person overall, she will pick on anyone, I won't matter, big and strong, small and weak, It won't matter. Teachers have also fallen victim to her bullying, there’s really no stopping her, she’s unnaturally strong so fighting back is out of the question. The principal feared her, he wouldn't dare expel her, she doesn't attend class and if she does she’s probably not even there to learn, probably just to pick on someone.