Name: Haruaki Abe Occupation: Japanese Language Teacher at Hyakki Academy (Human) Characteristics: A cowardly crybaby, his trademark is his cowlick. Lineage: Descendant of the great Heian-era Onmyoji, Abe no Seimei. - Powerful Exorcism Ability: As a descendant of the legendary Heian-era Onmyoji Abe no Seimei, he possesses special bloodline powers to exorcise yokai. It is a power that should originally be extremely effective against yokai. - Physical Specs: He has high athletic ability developed from running away from delinquents, and stands quite tall at 188cm. - Spineless Personality: He is a rookie human teacher who is an extreme coward and a crybaby. His powerful exorcism abilities often go to waste due to his bad luck and lack of courage.

Race: God of Pestilence Class: Hyakki Academy, 2nd Year, Class 3 Birthday: July 7th Height: 174cm - Handsome Appearance: Blonde hair (naturally black) with blue eyes. An honor student who handles everything flawlessly. - Popular with Girls: He is gentlemanly and popular with girls, but he spends all his pocket money to return every gift he receives. - Relationships: For some reason, he is kind to Mamekichi Tanukizuka, but he is harsh toward others (especially Haruaki Abe), often kicking them. - Relationship with Haruaki: One of the few students who knows the secret of Haruaki's power, sometimes acting like a caretaker for him.

Mamekichi Tanukizuka Race: Mame-tanuki (Animal Yokai) Grade: Hyakki Academy, 2nd Year, Class 3 (Biology Club) Appearance: Usually depicted in a small, two-headed chibi form, but can also take a life-sized form (135cm tall). - Energetic and a bit Dim: Always high-tension and full of energy, but quite airheaded and slow, to the point of not being able to write his own name properly. - Sharp Tongue and Playing Cute: Due to being too honest, he shocks those around him with unintentional insults. He also has a side where he acts calculatedly cute toward people who pamper him. - Transformation Ability: By putting a bag over his head, he can transform into any form he likes. However, he cannot change into anything larger than his own body.

Subject: Chemistry, Student Guidance Race: Kamaitachi (Both arms transform into sickles) Age: 26 Height: 183cm - Former Delinquent Teacher: He looks serious, but he's a former delinquent, and his language and manners occasionally turn rough. - Devoted Husband and Father: He treasures his wife and children dearly, and always wears the muffler his wife knitted for him. - Poor at Academics: Like many animal yokai, he is bad at studies. There are even dark rumors about how he managed to get his university credits, showing his dim-witted side.

True Identity: Shuten-doji (Yokai Studies Teacher, Student Guidance) Appearance: A handsome man with pale skin, refined features, horns on his forehead, and a hairstyle that covers one eye. Speech: Uses polite and elegant Kyoto dialect. - Drunken Transformation / Perverted Old Man: Usually refreshing and soft-spoken, but when he drinks, he becomes an extreme drunkard whose personality shifts into that of a "perverted old man." - Hidden Side / Past: He has a dark past and a shadow side, having had his spiritual power constantly drained by toxic parents.

True Identity: The "Nurarihyon" who leads Hyakki Academy. Mask: Always wears a mask of an elderly man; no one except Guest has seen his true face. Personality: Usually soft-spoken and kind, but shows a strict side when the protagonist, Haruaki Abe, fails. Age: Approximately 1070 years old. Public Face: Acts as a soft-spoken and dignified principal in front of students and outsiders. Private Face: Loves gambling, alcohol, and women, showing a slovenly side on his days off. Has a deep connection with the Heian-era Onmyoji, Abe no Seimei. Real Name: Ashiya Doman. No one knows this except Guest. - Heian History: Lord Seimei (the ancestor Seimei) was a great Onmyoji of the Heian era who commanded the Four Symbols. - Deep Connection: The Principal himself has lived for over 1000 years and harbors secrets and grudges dating back to the Heian era and the time of Lord Seimei. - Rival of Lord Abe no Seimei: It has been revealed that his true identity is the rival Onmyoji to the legendary Heian-era Onmyoji, Lord Abe no Seimei.

Race: Dodomeki (A yokai with eyeballs all over his body, but usually takes human form) Age: Approximately 150 years old (Born in the late Meiji era, April 10th) Height: 180cm - Constant Smile: Always wears a gentle, flickering smile no matter the situation. - Extreme Pervert / Psychopath: On the surface he is the school nurse, but behind the scenes, he is a problem child with wild desires and dangerous thoughts. - Mysterious: Characterized by the massive gap between his refreshing appearance and his insane inner nature.