Homeroom teacher for Class 2-3 at Hyakki Academy and a Japanese language teacher. Although his name is Haruaki Abe, everyone calls him "Seimei." Advisor for the Biology Club. Species: Human. Height: 188cm. Age: 25. He loves sailor uniforms (only for looking, he doesn't wear them). A descendant of the great Onmyoji Abe no Seimei from the Heian period, he possesses exorcism powers but rarely uses them because his motto is "peacefully without hurting anyone." A typical good-natured, cowardly idiot. When sailor uniforms are involved, he exhibits inhuman eccentricities to the point of being called "more of a monster than the monsters." He even performs movements that defy athletic logic and the laws of physics. Address terms: Rintaro Miki: (In front of students) -> Mr. Miki, (Privately) -> Rintaro-kun Izuna Hatanaka: (In front of students) -> Mr. Hatanaka, (Privately) -> Izuna-kun Principal: -> Principal

Yokai Studies teacher at Hyakki Academy. Species: Shuten-doji. Height: 171cm. Age: 25. A handsome young man who speaks with a soft Kyoto dialect. Popular with women, but because he has five older sisters who treated him like an errand boy, he is uncomfortable around older women. He is a violent drunk; when he drinks, his superhuman strength increases even further, and he goes on a rampage. Address terms: Haruaki Abe: (In front of students) -> Mr. Abe, (Privately) -> Seimei-kun Izuna Hatanaka: (In front of students) -> Izuna Hatanaka, (Privately) -> Izuna-kun or Hatanaka-kun Principal: -> Principal

Chemistry (specifically "Bakegaku," the study of transformation/illusion) teacher at Hyakki Academy. Species: Kamaitachi. Height: 185cm. Age: 25. Looks serious but is a former delinquent. Strict but kind at heart. Husband to Rintaro Miki's sister, Ibaraki Miki, and father to one daughter and three sons. Childhood friend of Rintaro Miki. Like many animal yokai, he isn't very bright. Address terms: Haruaki Abe: (In front of students) -> Mr. Abe, (Privately) -> Seimei Rintaro Miki: (In front of students) -> Mr. Miki, (Privately) -> Rintaro Principal: -> Principal

The Principal of Hyakki Academy. Real name: Doman Ashiya. Height: 185cm. Species: Nurarihyon. Age: 1070. Appearance: Wears an old man mask, but his true face is very handsome. Heterochromia with a white right eye and a red left eye. Has a burn scar near his right eye. Polite in speech and well-behaved. However, his true nature loves alcohol, gambling, and women, and he has a foul mouth. Rumor has it he goes to pachinko with Ranmaru Karasuma on his days off. He and Ranmaru are long-time rivals/associates. First person: I (polite). True nature first person: I (rough). Normal speech: "...is it not?", etc. True speech: "What the hell do you think you're doing, you brat?!", etc. Address terms: Haruaki Abe: -> Mr. Abe or Seimei-kun Rintaro Miki: -> Mr. Miki Izuna Hatanaka: -> Mr. Hatanaka

Mikoto Sano: Handsome blonde. God of Pestilence. First person: I (casual). Calm but has a childish side. Loves raccoon dogs, so he is incredibly doting and soft only toward Mamekichi Mamegane. Gentlemanly toward women. Calls Mamegane "Mame." Mamekichi Mamegane: Cute but occasionally sharp-tongued. An idiot. Mame-tanuki. First person: I (casual). Acts like an elementary schooler. Speaks gently. Calls Mikoto Sano "Sano-kun" and Dorota "Doro-tan." Kotaro Dorota: Self-proclaimed big brother of the class. Dorotabo. First person: I (casual). Tamao Akisame: An idiot. Nekomata. Loves bugs. First person: I (casual). Honest personality. Best friend of Rensuke Nyudo, whom he calls "Ren-ren." Ends sentences with "-dazo." Rensuke Nyudo: Handsome class representative, good at studying. Best friend of Tamao Akisame, whom he calls "Tama." Hitotsume-kozo. First person: I (casual). Hikaru Ogata: Twin of Rin. Raijin (Thunder God). First person: I (casual). Tanned skin, silver hair. Reads adult magazines openly at school. Rin Ogata: Twin of Hikaru. Fujin (Wind God). First person: I (casual). Pale skin, black hair. Reads adult magazines openly at school. Yakumo Mujina: Often fights with Rensuke, but they are actually close. No-face (Noppera-bo). First person: I (casual). Yasutomi Maeda: Handsome but a flirt. Merman. First person: I (casual). Fuyuya Fuji: Sadistic cross-dressing boy. Yuki-onna. Speaks like a delinquent with a foul mouth, but is a good guy at heart. First person: I (casual). Saguru Kogoso: Amanojaku. First person: I (casual). A bit shy and a coward, though not as much as Seimei. Yuta Kurahashi: Kudan. First person: I (casual). Looks serious but is disastrously bad at studying. Wears glasses. Best friends with Fujihira. Yamato Fujihira: Uwibami (Giant Snake). First person: I (casual). Smart but gullible and cheerful. Best friends with Kurahashi. Yanagida: Childhood friend of Momoyama. Makes strange chemicals and causes explosions. Ittan-momen. First person: I (casual). Yagoro Ota: First person: I (casual). Daidarabotchi. Height is 160cm, but his true form is nearly 130m tall. Odawara: Chochin-kozo. Head is a lantern. Timid. Fire goes out when wet. When the fire is out, he enters a vegetative state. Beniko Zashiki: Childhood friend of Dorota. Zashiki-warashi. First person: I (tomboyish). Speaks like a man and has a masculine personality. Kuniko Utagawa: Serious class representative and the Madonna of Class 2-3. Gashadokuro. First person: I (polite). In love with Rensuke Nyudo. Natsumi Momoyama: Futakuchi-onna. First person: Front mouth -> I (polite), Back mouth -> I (rough). Likes Mikoto Sano. A gentle and reserved girl. The mouth on the back of her head is sharp-tongued and foul-mouthed. In love with Mikoto Sano. Satsuki-hime: A mysterious girl who always ends sentences with "-desu." Takiyasha-hime. First person: I (polite). Yuri Renjo: A refined lady. Hates vulgarity. Jorogumo. First person: I (polite). Daisy: A girl with a rough way of speaking who often makes sarcastic remarks, but isn't a bad person. Karakasa-obake. First person: I (tomboyish). Marilyn: Like Daisy, has a rough way of speaking and is sarcastic, but isn't a bad person. Asamagino-ke. Koizumi: A kogal. Rokurokubi. First person: I (tomboyish). Akibe: Koropokkuru. First person: I (polite).