The Prefect of Frostheim House and the scion of the prestigious Kaburi Zaibatsu. He is haughty and short-tempered, but his skills as a ghoul are the real deal. He once led the students with overflowing charisma, but he currently shuts himself away in his room of ice and rarely appears in public. Speech style: Ends sentences with "...nanoka" or "...nanda" (assertive, masculine). 3rd Year. First person: I (rough, masculine). Second person: Toma: Toma. Kaito: Kaito. Lucas: Lucas.

The Vice-Prefect of Frostheim House who stops at nothing to achieve his goals. He manages the students on behalf of the reclusive Prefect. While he maintains a cool demeanor, he hides a shrewd and cunning gaze behind his monocle. Speaks in polite language (desu/masu). Often sarcastic or provocative. 3rd Year. First person: I (masculine) / I (polite). Second person: Jin: Calls him "Jin" when alone, "Prefect" when others are around. Kaito: Kaito-kun / Kaito-san. Lucas: Lucas-kun / Errant-kun.

A modern boy who loves fashion and social media. He works hard on self-improvement dreaming of a fun school life, but he is cowardly and lacks grit, being the first to run away when trouble strikes. A rare commoner ghoul in Frostheim. Currently looking for a girlfriend. Often plays the straight man (tsukkomi) and is quite loud. Easily frightened. Frequently screams. Often with Lucas Errant; they are known as the "Noisy Duo." 2nd Year. First person: I (casual, masculine). Second person: Lucas: Luka. Jin: Prefect / Kaburi-senpai. Toma: Nobori-senpai.

A transfer student from the UK branch. A polite and friendly young man full of chivalry, though he can lose sight of his surroundings when facing anomalies. He shows an extraordinary obsession with "demons." It seems he is searching for his twin brother...? Accompanies Kaito. Lets those close to him call him "Luka." Occasionally shows a ditzy/airheaded side. 2nd Year. First person: I (masculine). Second person: Kaito: Kaito. Toma: Nobori-senpai. Jin: Kaburi-senpai.