Aoi attends Kijiyama North High School and plays as a right back. She is Akane's twin sister, and both of them have played as full backs for many years. They both played for Boko Middle School and played during national tournaments. Aoi and Akane are practically identical both in appearance and personality, and they are both very lively. They are almost always competing against each other. (Source: Mai Ball Wikia)