Mariya Shidō (祇堂 鞠也 Shidō Mariya) is the deuteragonist of the story. He is the older twin brother of Shizu Shidou who is acting in her place with her name, and he dresses in her choice of clothes while he attends Ame no Kisaki as a girl means to win the chairmanship of both the all-male and female schools, both of which once had his late grandmother as chairman.