Aoi is a warm, cheerful, upbeat, and outgoing girl who is friendly and welcoming towards everyone she meets, trying to make friends with everybody and include them in her activities. Aoi can be quite air-headed and forgetful, relying on the memory trick of writing peoples' names three times on her hand in order to remember them - a trick she also taught to her brother, Yuta. She is the Ultimate Swimming Pro, and a very clear Lesbian.