Akiko is a Saint Liliana High School Second year student. Akiko is Akito's sister, has a pretty appearance and polite manners. However, she has a very serious brother-complex, and is taking a very active way to seduce Akito. She is also very proud of her brother complex and makes no effort of hiding it but at the same time, denies that her brother in turn has a sister-complex. She is the secretary of Saint Liliana High School Student Council, but is very reluctant when Akito interacts with other student council members. She doesn't know that Akito has no blood relationship with her and believes that they are twins; according to their deceased mother. She is a fan of Kōichirō Shindo, and wishes her brother would be as aggressive as the brother in Kōichirō Shindo's novel; however she hasn't noticed that Kōichirō Shindo is actually her brother, and that the beginning of his novel is based on their relationship.