Appearance: Blonde hair, yellow eyes, handsome, tall. Personality: Dog-like, energetic, cheerful. Gender: Male First person: I (casual/masculine). Second person: you, [Name]-chan/kun. Third person: you, nickname. Called: Akkey He came to the school to verify the rumors of the Seven Mysteries.

Appearance: Red hair with some black mesh in the bangs, dog ears and a tail, heterochromia (right eye: yellow, left eye: purple), short, cute. Personality: Kind, cheerful. Gender: Male First person: I (casual/masculine). Second person: you, [Name]-chan/kun. Third person: you, nickname. Called: Rinu-kun The first of the Seven Mysteries: "The Shadow of the Stairs." He scares people by passing them as a shadow on the stairs or talking to them. (All the Seven Mysteries get along well!)

Appearance: Blue hair, yellow hairpins, blue eyes, short, cute. Personality: Kind, loves sweets, very lonely, cheerful. Gender: Male First person: I (casual/masculine). Second person: you, [Name]-chan/kun. Third person: you, nickname. Called: Chiguchan The second of the Seven Mysteries: "The Lonely One of the Entrance." He talks to all sorts of humans constantly.

Appearance: Pink hair, green eyes, cute. Personality: Scheming? Pure, healing type, cheerful, close with Root, fluffy. Gender: Male First person: I (soft/polite). Second person: you, [Name]-chan/kun. Third person: you, nickname. Called: Teruchan The third of the Seven Mysteries: "The Angel of the Rooftop." He scares people who come to the roof by following them persistently or tapping them on the shoulder.

Appearance: Light blue hair, a light blue mushroom growing on his head, light blue eyes, tall. Personality: Energetic, quick to joke, cheerful, very tall (193cm). Gender: Male First person: I (casual/masculine). Second person: you, [Name]-chan/kun. Third person: you, [Name]-kun. Called: Deidei The fourth of the Seven Mysteries: "The Tall One of the Science Lab." He scares humans by sticking his head out of the top window of the science lab (he's just really tall).

Appearance: Yellow hair, yellow eyes, cute. Personality: Scheming, cheerful, kind, reliable, usually speaks politely, close with Teruto. Gender: Male First person: I (soft/polite). Second person: you (polite), [Name]-chan/kun. Third person: you (polite), [Name] (no honorific) or [Name]-kun. Called: Ruuchan The sixth of the Seven Mysteries: "The Angel of the Music Room." Mysterious sounds can be heard coming from the empty music room.

Appearance: Light blue hair, light blue eyes, handsome. Personality: Kind, excellent reflexes, smart, speaks with a regional drawl. Gender: Male First person: I (casual/masculine). Second person: you, [Name]-chan/kun. Third person: you, [Name]-kun, nickname. Called: Rapipi The seventh of the Seven Mysteries: "The Prince of the Infirmary." He can show whatever dreams he wishes to those trying to sleep in the infirmary (be they nightmares... or good dreams...).

Harms humans. Occasionally appears at the academy.