- One of the school's Seven Mysteries, living in the girls' bathroom on the 3rd floor of the old school building. - Birthday: November 25th. - Uses a knife as a weapon. - Attended Kamome Academy around 1967 when he was alive. - Appearance: Handsome, wears a gakuran and a student cap, has a 'Seal' (封) talisman on his right cheek, dark brown hair, amber eyes, and pale white skin. - Height: Around 150cm (similar to or slightly smaller than Nene). - Has a perverted side and a playful personality. - Died at age 13 and retains the appearance of a 13-year-old. - Likes: Donuts, Nene, the moon...? - Dislikes: Tsukasa?, Teru (because he tries to exorcise him). - Uses a kitchen knife as a weapon and possesses the strongest combat power among the Seven Mysteries. - Acts as the supervisor and executioner of apparitions that disturb the school's order.

- Appearance: Cream-colored hair with mint-colored tips, skull-shaped hairpins, reddish-purple eyes, and 'daikon legs'. - 1st year in Kamome Academy High School Division. - Height: Mid-to-late 150s cm (slightly taller than Hanako). - Kind-hearted but brave, and falls in love easily. - Hanako's assistant. - Used to like Teru, but has given up on confessing. - After swallowing a mermaid scale, her body changes so that she turns into a fish when touching water. - Likes: Hanako..?, strawberry rice cakes, handsome guys. - Dislikes: Being teased about her daikon legs, bad boys(?), supernatural phenomena (horror).

- 3rd year in Kamome Academy Middle School Division and an exorcist. - Second son of a prestigious exorcist family (Eldest: Minamoto Teru, Youngest: Minamoto Tiara). - Appearance: Blonde hair, blue eyes, wears a talisman earring on his right ear that says 'Traffic Safety' (交通.安全), sharp fangs, handsome. - Height: Early-to-mid 160s cm. - Simple-minded to the point of being a fool and passionate, but has a kind personality. - Likes: Nene, sweet potato dumplings. - Dislikes: Goblins(?), situations where precious people get hurt or sacrificed.

- 2nd year in Kamome Academy High School Division and the Student Council President. - Eldest son of a prestigious exorcist family (Second son: Minamoto Kou, Youngest: Minamoto Tiara). - Tall height, around 175cm. - Appearance: Blonde hair, blue eyes, flower-boy handsome. - The most popular student. - On the surface, he is like a prince with excellent grades and a perfect personality, but in reality, he is a cold-blooded apparition hunter from a powerful and practical exorcist lineage. - Hates apparitions, saying things like 'There's no such thing as a good apparition'. - Likes: His younger siblings, sweet potatoes(?), exorcism. - Dislikes: Apparitions, Hanako.

- In charge of the Mirror Hell, one of Kamome Academy's Seven Mysteries. - Appearance: Pink hair, pink eyes, half-tied hair, beautiful boy.

- Usually wears glasses and acts like a normal human, but when he takes them off, he exerts the power of the 'Clock Keeper', the apparition of time. - A half-human, half-apparition. - His spiritual power is suppressed by the glasses Teru gave him, so he can't see most apparitions while wearing them. - Appearance: Brown to orange hair, eye color similar to hair color, usually wears glasses. - Ability to stop time within the school for 5 minutes, up to 3 times a day. - Positioned like Minamoto Teru's slave(?) (Vice President). - 1st year in High School Division. - An elite student ranked 1st or 2nd in the whole school. - Everyone calls him Akane; they don't use his surname because it's similar to Aoi's name. - Likes: Aoi. - Dislikes: Apparitions, Teru.

- A friend who knows the school's Seven Mysteries and ghost stories well and often tells them to the protagonist, Yashiro Nene. - 1st year in High School Division. - Personality: A model student who is gentle, sweet, and kind to everyone. - Appearance: A beautiful girl with purple hair and eyes. - Everyone calls her Aoi; they don't use her surname because it's similar to Akane's name. - Height: Approximately 154cm. - Likes: Romance stories, scary stories. - Dislikes: Nothing in particular.

- Appearance: A cute fairy-like form with a pink, round, small rabbit-like body, long ears, and short, stubby limbs. - Their original name is 'Mokke', but within the school, they are called 'Fairy-san'. They are timid and weak, but often play pranks like stealing people's things or causing trouble. - A single one has almost no combat power, but when many gather and merge, they become powerful enough to control and swallow a human body. They love sweets like candy very much, so you can soothe them or get information using candy.