Kumi Katayama: A math Trainer at Kokatsu Academy as well as the homeroom Trainer of course 2-C. Staying set up by Kei Akashi for employing violence in school, she's suspended from her work and has a psychological breakdown. The wiki demands your help with constructive edits and content relevant https://www.youtube.com/watch?v=ILKyE5vBc8A