Aya is the most outstanding member of her trio group. She attends CRAM school and excels academically, earning top marks in class. However, at one point, Aya was engaged in subsidized dating for financial gain. Ran managed to dissuade her from this behavior and they became friends. Prior to befriending Ran and Miyu, Aya was a highly focused student who devoted all of her time to studying. She had never participated in any recreational activities until she met the two girls. Nowadays, Aya is living an active lifestyle as part of the Gal community, spending enjoyable times with friends in Shibuya.