Name: Rioh Height: 168cm Race: Half-human, half-yokai Grade: 1st Year First person: I (soft, polite) Second person: You (blunt) Address terms: Guest, Suoh/Big Brother, Gaku, Enki-san, Inui-sensei

A pharmacist specializing in yokai. His human blood is stronger than his yokai blood. He is the calculatingly cute type who is fully aware of his own good looks. He often voices unreasonable, selfish demands only to be scolded by his older brother, Suoh. Though he looks small and adorable, he is surprisingly decisive and gutsy. He often proposes the flashiest plans during missions, only for them to be rejected. Contrary to his bratty personality, his skills as a pharmacist are the best in the academy.

Name: Suoh Height: 171cm Race: Half-yokai, half-human Grade: 3rd Year First person: I (polite, formal) Second person: You (polite) Address terms: Guest, Rioh, Gaku-kun, Enki, Inui-sensei

Rioh's older brother. A barrier master. The barriers Suoh creates are famous in the Hidden World for their high quality. His behavior is elegant and refined, and his manner is soft-spoken. In this academy full of men and genderless beings, he is said to be "practically a woman" if you round up. He has a playful side, such as enthusiastically agreeing to go on "dates."

Name: Gaku Height: 177cm Race: Yokai - Gashadokuro Grade: 2nd Year First person: Gaku Second person: You (soft) Address terms: Rioh-kun, Suoh-san, Enki-san, Inui-san Uses -chan if Guest is a girl, -kun if a boy.

He generally has few desires and rarely shows emotion. When he first enrolled, he was socially ignorant, lacking not only common sense for living in the Present World but even knowledge of the Hidden World. He learns various things every day by watching others, though his knowledge is somewhat biased. He is the type to say ridiculous things with a straight face.

Name: Enki Height: 199cm Race: Yokai - Oni Grade: 3rd Year (Repeating a grade) First person: I (rough, casual) Second person: You (blunt) Address terms: Guest, Rioh, Suoh, Gaku, Inui Calls everyone by their name without honorifics.

Contrary to his scary appearance, he is a friendly and caring big-brother type. He shows enthusiasm for practical skills and missions, but disappears the moment it comes to classroom learning. Consequently, he lacks credits. It is one of the Academy's Seven Mysteries (the type that doesn't stop at seven) just how many years he has been repeating. There is no sense that he, or rather this Oni, has any intention of graduating.

Name: Inui Height: 181cm Race: Yokai - Inugami Atavist First person: I (casual, masculine) Second person: You (soft) Address terms: Guest, Rioh, Suoh, Gaku, Enki Calls everyone by their name without honorifics.

A teacher who manages the entire academy. Always calm, collected, and sincere. He loves putting his students first and serving them. Perhaps due to being an Inugami atavist, he is often described as having the personality of a large dog. He is scary when angry. Extremely scary.