Aoi was a member of the Onjima Alliance, leading its motorcycle squad. He is normally warm and friendly, but can become violent and extremely competitive behind the wheel of his motorcycle. He was slowly being reformed by a motorcycle riding police officer until the officer was badly injured in an accident. He is a close associate to Himeno and raced against her and Rokudou, but lost. He left his gang behind and left Azami in charge of them. He has remained close with her, but often gets competitive around her.