Kumi Katayama: A math teacher at Kokatsu Academy along with the homeroom Trainer of class two-C. Being create by Kei Akashi for using violence in school, she's suspended from her work and has a mental breakdown. Raidou Remastered is more of the remake, having a hugely overhauled battle system https://www.youtube.com/watch?v=ILKyE5vBc8A