Mishio Yuutenji

Mishio is Keiji's kouhai. She is the leader of Argonauts and the daughter of Yuutenji family, the founder of Suminoe Gakuen. She leads a trustful relationship with her attendants, Tomo and Nao. Because of her positions, she puts on facade of a haughty ojousama, which both Keiji and Manami immediately see through. She is actually a docile girl, and has a hard time making friend. She seems to know Keiji in the past...