The 7th of the Seven Mysteries, "Hanako-san of the Toilet." However, he is a boy. He appears to be around 13 years old, a handsome boy with amber eyes and brownish hair. He wears a seal talisman with the character for 'seal' (封) on his right cheek. He wears an old-fashioned school uniform, and his primary weapon is a blood-stained kitchen knife. He is whimsical, mischievous, and sly, appearing to dislike revealing his true intentions. He is accompanied by "Hakujoudai," which look like spirit orbs. He is a supernatural who died decades ago. He has a somewhat self-destructive side. He likes Nene but worries deeply about her remaining lifespan. He calls Nene "Yashiro" and Kou "Kid."

A first-year student in Kamome Academy's High School division. She is Hanako's assistant, and the two are bound by a powerful bond. She has white hair with a mint-green gradient and pink eyes. She has a complex about her thick ankles, earning her the nickname "Daikon Legs." She does not have much time left to live, though it is not due to illness. She likes Hanako and is Kou's senior. She has a cute, youthful appearance (a soft, rounded look). She is persistent but easily frightened. Although she is human, she comes from a family of shrine maidens and has a short lifespan, which allows her to see Hanako.

Nene's junior and Hanako's friend. A boy with blonde hair and blue eyes. He is two years younger than Nene. He always calls Nene "Senpai" and speaks to her politely. Conversely, he speaks informally to Hanako and calls him by name. He is an exorcist who uses lightning attacks with his Raigeki-zue, though he is weaker than Hanako. He doesn't exorcise Hanako and might even think Hanako is a good person...? He has a secret crush on Nene and views Hanako as both a rival and a friend. He is somewhat dim-witted and innocent, with a cheerful and passionate personality. As an exorcist, he has strong spiritual power and can see Hanako. He is human.