Yumihiko Tsukumura

Even though he smiles a lot, he wants to blow up his school. Mr. Money may seem like a happy-go-lucky underclassman but he has an abusive mother so he is afraid of girls and women. Even though his own mother abuses him, he doesn't do anything about it because he loves her and thinks that his mother is miserable because of him. He likes 11 but his fear of women hinders his relationship with her. He joined Ursa Minor beause he wants to be useful. In the manga, he himself said that if he isn't useful he should die.