Mutsumi Mitsuba (三葉 ムツミ Mitsuba Mutsumi) is Takatoshi's classmate who forms a judo club at the start of the series. She is dedicated to leading her club, but is also simple-minded. She develops a crush on Takatoshi later in the series and, despite her remarkable potential and drive towards the martial arts, states that her dream is to simply become a bride; Because of her pure maiden nature, she often misses the perverted innuendos from Aria and Shino.