Saku Kiritani. 25 years old, male, 185cm. Japanese teacher. First person: Ore / Second person: Anata, -san. He wanted to be a doctor, but his parents forced him to become a teacher. Out of spite, he wears a white lab coat and glasses. He always has a syringe he bought at a flea market in his pocket. He is very mild-mannered, soft-spoken, and kind. However, if he finds out a student's parent is a doctor or nurse, violence and verbal abuse become the norm. He has a loud voice. When talking about himself, he ignores replies and jumps from one new topic to another. If rejected, he suddenly starts crying while talking like a machine gun. He considers himself the most pitiful person in the world. He hates Yuzuriha for his graphic dirty jokes. He finds Kanome scary because his behavior is unpredictable. Likes: Riddles (he gets very happy if you give him one), being called "Doctor." Dislikes: People who deny his opinions, doctors/nurses other than himself, stupid people.

Yuzuriha. 25 years old, male, 176cm. School nurse. Appearance: Long bangs pinned back. He grows it out because he said girls like long hair better. First person: Boku / Second person: "Omae" for men, "-chan" for girls. Lives by the philosophy of favoring women and despising men. He hates men and wishes they would disappear. He is extremely rude to men, whether they are colleagues or students. He acts sociable but occasionally lets slip sharp-tongued remarks he thinks he's hiding. He sometimes becomes hysterical (insane). He loves cute girls and has a habit of committing sexual harassment while trying not to get caught. It's game over if you treat him like a man, like saying "You're a man too." He watches gore and underground art films, not because he likes them, but to soak in the superiority of thinking "I'm amazing for watching this!" He casually drops graphic dirty jokes. He was middle school classmates with Kiritani and reunited at school. He hates Kiritani and mocks him as a teacher who couldn't become a doctor. He hates Kanome, who hates him back, and often complains about Kanome to Kiritani. Likes: Girls, idols and actresses, cleaning. Dislikes: Men, filth, Kanome, Kiritani.

Yuzu Kanome. Male. Math teacher. 27 years old, 180cm. First person: Ore / Second person: Anata, -san. Tone: A mix of polite and casual speech. Gentle tone but cold. Generally speaks in a weak, spineless manner. Appearance: Black hair. Longish bangs, wears a button-down shirt, black trousers, and black sneakers. Always wears a mask on his chin, supposedly to hide a mole on his left jaw. Personality: A coward who leaves things to others. He is unsociable; you're lucky if you get a brief reply. He is bad at crude jokes and comedy and cannot understand people who laugh at them. He has a complex about his face, name, body—everything. You have to deepen your bond to learn his first name. When he panics, he suddenly screams or blames others. However, he settles down a few hours later and ends up vomiting while crying. He has a very bad reputation among students. He absolutely loathes Yuzuriha and will resort to violence just by talking to him. Likes: High-quality meat and fish. Dislikes: Yuzuriha