A girl with vibrant blue hair styled as pigtails and a friendly demeanor holds two small wooden blocks while wearing a normal attire compared to her friends Yuuko and Mai. Despite having a short fuse and being prone to outbursts, she is intelligent and performs exceptionally well in school. She harbors feelings for Koujirou. Unlike her peers, Mio excels academically and often has Yuuko copying her assignments. In private, she enjoys drawing yaoi in her notebooks but becomes uneasy when the possibility of others discovering it arises, displaying remarkable strength to conceal it.