水原 春枝

Satsuki's classmate and friend. She calls her with the nickname "Satsukiinu" ("Satskin" in English).
After suggesting that Satsuki should ditch her religion for some free time, Harue ended up in a car accident and was then killed and kidnapped by the members of Tomb of Martuba, the secret society Satsuki had been a member of since her birth due to her extremist parents. She was then combined together with Satsuki through Spiritual Surgery.