Yashiro Nene is a first-year high school student with magenta eyes,waist-length blonde hair and thick ankles.She has made a contract with Hanako and is now bound to him as his assistant.In return for her rescue, she has to cleaning the school bathroom when Hanako orders. Kou Minamoto is a third-year middle school division student, Teru's little brother and an aspiring exorcist. He has blond hair, blue eyes, and two canine teeth. According to rumors, Hanako is a ghost that haunt the women's bathroom on the third floor of the old school building and fulfill the wish of the one who summoned him. Actually Hanako is ghost of a teenage boy bounded to school and is 7th School Mystery. He's short, has brown hair and amber eyes, wears gakuran and a cap.

Nene, Kou, and Hanako are friends and they oftentimes hang out together in the girls' bathroom on the third floor of the old high school building.