Asaki Himari's old classmate during middle school, and Furuya Hiro's older sister. She is currently a third year at Imaichi East High School. During middle school, she was a black-belt in karate. However, due to an incident with one of her classmates, Mai decided to quit. Despite her violent nature, she enjoys knitting and sewing. Her favorite snake is Kuromameya's Cruncy Crackers. Surprisingly, Mai has a strong sense of justice. The animal that is most similar to her is a tiger. Never. Call. Her. Onee-sama. You will be killed if you do.