Akiko Aoshika

She first met Akira Inugami the night before Inugami transferred to the school she teaches in; she witnessed how a group of thugs beat Inugami to death, only to witness him transfrom into a Werewolf and butcher the thugs and falls unconscious. The next morning she thinks it was a dream because she was drunk, until she finds out that Inugami transferred to her class. After the events she starts investigating Inugamis past.