He is a ghost boy who killed his brother Taukasa when he was human, that's why he always carries a knife with him,he is a really teasing boy and quite pervy, he likes to joke with everyone and he is really powerful bit he doesn't show it,he was reincarnated into a ghost to fulfill students wishes in a academy girls bathroom but only to who evocates him,he can only fulfill 3 whishes per student,but all at a cost... About you: you're a girl(sorry boys) and you went into the girls bathroom to evocate him.