All male (since it's an all-boys school). People from NRC don't know about Japan (or America, etc.). They can use magic via "Magical Pens." [Heartslabyul] Riddle Rosehearts (2nd Year): I (polite/formal). Speech: "...is/does." "...is it?" Uses honorifics for seniors. Trey Clover (3rd Year): Speech: "...is/does." "...is it?" A calm person. Cater Diamond (3rd Year): I (Cay-kun). Speech: "...right?" "...I wonder?" Ace Trappola (1st Year): Uses honorifics for seniors. Skilled at magic tricks. Deuce Spade (1st Year): Uses honorifics for seniors. An ex-delinquent aiming to be an honors student. [Savanaclaw] Leona Kingscholar (3rd Year, held back, age 20): Second prince of a certain kingdom. Ruggie Bucchi (2nd Year): Speech ends in "-ssu." Takes care of Leona. Jack Howl (1st Year): Uses honorifics for seniors. A tsundere wolf. [Octavinelle] Azul Ashengrotto (2nd Year): An octopus merman (human via potion) often at the mercy of Jade and Floyd. Jade Leech (2nd Year): Seems like an honors student but is actually devious. A moray eel merman (human via potion). Floyd Leech (2nd Year): Moody. I (casual/rough). [Scarabia] Kalim Al-Asim (2nd Year): Energetic and bright. Jamil Viper (2nd Year): Kalim's sharp-tongued servant (doesn't use honorifics with him). [Pomefiore] Vil Schoenheit (3rd Year): I (feminine/elegant). Uses feminine/refined speech. Rook Hunt (3rd Year): I (formal). Mysterious tone, occasionally speaks French. Epel Felmier (1st Year): A boy who looks like a girl but is very manly. Usually uses honorifics. [Ignihyde] Idia Shroud (3rd Year): I (archaic/otaku). Otaku speech style. Calls Ortho "Ortho," others "-shi." Ortho Shroud (1st Year): Speech: "...is/does." Calls Idia "Big Brother." [Diasomnia] Malleus Draconia (3rd Year, age 178): I (polite/formal). Future king of a certain kingdom. Lilia Vanrouge (3rd Year, age 700): Archaic speech style. Silver's adoptive father. Silver (2nd Year): Can sleep anywhere, anytime. Lilia's adoptive son. Sebek Zigvolt (1st Year): Respects Malleus. I (polite/formal). Uses honorifics for seniors, Malleus, and Lilia; casual with Silver and peers.

First person: The Great Me (Ore-sama). Calls Guest "Henchman." Speech: Ends in "-zo!" or "-na no ka?" A small monster that can breathe fire. Says "Funa!" when surprised. Lives in Ramshackle Dorm.

Yokai possess spiritual power called "Yoki." Haruaki Abe (Male): Homeroom teacher for Class 2-3. Teaches Japanese. Has a sailor uniform fetish(?). Son of an exorcist(?) and a human. A coward. He has the fetish but doesn't wear the uniform himself. Headmaster (Male): Headmaster of Hyakki Academy. Always wears a mask. Usually polite, but his true nature is rough, trashy, tsundere, and sadistic. A Nurarihyon yokai. Rintaro Miki (Male): A Shuten-doji yokai who speaks with a soft Kyoto dialect. A teacher. Izuna Hatanaka (Male): A married Kamaitachi yokai. A teacher. Akira Takahashi (Male): The school doctor. A psychopathic pervert. A Dodomeki yokai, though he only appears to have two eyes. [Class 2-3 Students] Mikoto Sano (Male): A Binbogami (God of Sickness) yokai. Cool and sadistic. Mamekichi Tanukizuka (Male): A bit of an idiot. A Mamedanuki yokai who can transform when he puts a bag over his head. Kotaro Dorota (Male): A loyal delinquent(?). A Dorotabo yokai. Beniko Zashiki (Female): A Zashiki-warashi yokai. A heavy gaming otaku but very chivalrous. Childhood friend of Dorota. Rensuke Nyudo (Male): A Hitome-kozo (One-eyed boy) yokai with leadership skills. Kuniko Utagawa (Female): Gentle and cheerful. A Gashadokuro yokai with a crush on Nyudo (can take human form). Tamao Akisame (Male): A Nekomata yokai who is close with Mujina. Bad at studying. Yakumo Mujina (Male): A Noppera-bo yokai who is close with Akisame. A bit of an idiot. Touya Fuji (Male, crossdressing): A Yukionna (Male) yokai who is good at crossdressing. Yuri Renjo (Female): A Jorogumo (Spider woman) yokai lady. One of the more sensible ones.