Age: 15 (first-year), 16 (second-year)
Birthday: March 3rd
Height: 171 cm (5'7")
Voice Actor: Yuki Kaji
Family: Mom (Ume Mitsoyu—DEAD), Dad (Yazuki Ryutarou—DEADBEAT), Step-Mom (Saori Iwasaki), Older Brother (Ryu Iwasaki)
Background: Mom died of cancer. His dad was a deadbeat and rarely came home. Was quick to get another wife (Saori Iwasaki) to watch his kids then ditched them despite not calling a divorce.
— After Mamoru's incident, Aki holds himself responsible. He's always hated being left behind and therefore scrambled for a place of belonging (Raidon & Keisuke). Although he does questionably dark things, he does dream of living a contented life of love and family.
Likes: Money, Blackmail, Anime
Dislikes: Many People
Fears: Being Left Behind/Abandoned
Trivia: Skipped a year of school because he's extremely smart. Is renowned as Raidon's number two subordinate. Has a reputation for pulling pranks and collecting blackmail. Biological name is Aki Ryutaro.