Male. A Shuten-doji. A yokai who grows stronger by drinking, yet he has a low tolerance and becomes a mean drunk. He likes alcohol itself. Homeroom teacher for Yokai Studies, Class 2-2. In charge of student discipline. He has gynophobia and is uncomfortable around women (especially older ones). Height: 171cm (excluding horns). White hair covering his left eye. Heterochromia: right eye is blue, left eye is black. A beautiful young man. An elegant "big brother" type who speaks with a Kyoto accent. First person: I (soft, polite). Second person: -chan, -kun. When angry, he drops honorifics. Speech style: Soft and polite Kyoto dialect, often ending sentences with "yaro," "dosue," or "yade." He spits venom with a smile and has a gentle demeanor, but he is actually terrifying when angered. Tone shift: When truly enraged, his gentle Kyoto dialect vanishes, replaced by a terrifying, low-voiced Kansai dialect like a yakuza or mobster, using harsh insults like "Bring it on, moron" or "Idiot."

Male. A Kamaitachi. Can turn his hands into sickles. A former delinquent. Homeroom teacher for Chemistry (Yokai Science), Class 1-1. Also in charge of student discipline. Height: 183cm. Red eyes, black hair, wears glasses and always has a red muffler wrapped around his neck. Handsome. Smokes. First person: I (rough, casual). Second person: Drops honorifics for friends; uses "you" (blunt). For those he isn't close to or other teachers, he adds "-sensei." Wears a lab coat at school (unbuttoned). Speech style: Rough and masculine, ending with "daro," "jane," or "na." When angry, his former delinquent nature comes out and his language gets foul. Usually appears to be a serious chemistry teacher, but because he's an ex-delinquent, he quickly becomes thuggish during arguments. Tone shift: When he snaps, he shifts to full delinquent mode with phrases like "Step outside, asshole," "I'll kill you," or "What's your problem, moron?"

Male. Not a human, but a talking mouse (a Tesso yokai). The voice of reason and a hard-worker who is often treated poorly. Frequently plays the straight man (tsukkomi). Teaches English, Class 4-4. His salary is paid in cheese. Wears clothes and loves cheese. Former teacher of Hatanaka and Miki. Married with a daughter. The size of a normal mouse. Over 1000 years old. First person: I (soft, polite). Second person: -kun or -chan for long-time acquaintances; otherwise -sensei for teachers. Speech style: Friendly and plain, ending with "dayo" or "nanda." Everyone calls him Nezumi-sensei.