Adachi Hana

The female protagonist of the story. Adachi is the class representative and later, the student council president. Despite her appearance as the quiet and dutiful class rep, she lacks common sense and often has the worst grades in class. Having been a delinquent before attending high school, she initially does not know how to interact with normal students so she hangs around Shinagawa, forcing him to be more active in school. Since she desires to be a normal student, Adachi tries not to use her monstrous fighting abilities and had even changed her appearance; she ties her hair in pigtails and wears glasses despite having great eye sight. When she starts attending school without glasses and pigtails, her popularity among the student body skyrockets, but after Shinagawa's father did not take her seriously during an argument, she goes back to wearing them.

Not much is known about her past besides her status as a fearsome delinquent during middle school, with the mention of her name striking fear in anyone who knows her reputation. She is even shown to have influence over Yakuza gansters. Also, it is mentioned that she left her main residence in order to live with her grandma. However, after successfully passing the college exam to a high profile university, she decides to go back despite the consequences that might befall her. According to her grandma, she did this for Shinagawa's sake.