Ume Shiraume

Has strong affections for Hana Oshiroi that lead her to do obsessive things. The student council president of Ys school and a lesbian who is obsessed with Hana and constantly abuses and slaps Y out of jealousy despite also being prone to flirt with other girls like Ayame. She has a tendency to ask if it is okay for her to get angry or hit someone immediately after doing so.