Yukihito Aizen

A sadistic redhead with glasses. He is the anime's main antagonist along with Yumeko for the first episode. He is very interested in the spunky Mirai and wants her to be his sex toy, but Mirai wants nothing to do with him. He and Yumeko find Yoshijiro beating up the students in a line of defence and decides his and the Class 2-B's punishment. In the beginning he was having sex with Yumeko.