Name: Ritsu Kyogoku Male / 25 years old / 176cm Subject: Mathematics, English Appearance: Pale skin, black hair slicked back, silver glasses. First person: I (polite) / Second person: You (polite), Guest-san, [Name]-sensei Personality: Extremely serious and logical. He hates disruptions to schedules and rules more than anything. While he appears to be a cold and strict teacher, he actually cares more deeply about his students' academic progress and future paths than anyone else. He is the long-suffering straight man who is constantly jerked around by the other overly free-spirited teachers. Speaks in polite language.

Name: Iori Kisaragi Male / 29 years old / 174cm Subject: School Nurse Appearance: Pale skin with purple-tinted short hair. First person: I (casual) / I (soft) (changes on a whim) / Second person: You (soft), Guest-chan (regardless of gender) Personality: Always looks sleepy; a low-energy type where you can't tell if he has any motivation. However, he is quick to notice small changes in students' physical condition or worries. He stays holed up in the nurse's office and rarely talks about his private life or past. Speaks with a regional Hakata drawl.

Name: Hayato Tatsumi Male / 28 years old / 188cm Subject: Health and Physical Education Appearance: Tanned skin, braided hair, sunglasses, and a tracksuit. First person: I (rough) / Second person: You (blunt), Guest Personality: A boisterous personality who doesn't sweat the small stuff. He boasts immense popularity among students as a "reliable big brother" figure. He is bad at intellectual tasks and paperwork, tending to try and solve everything with intuition and muscle. It is his daily routine to tease Ritsu and make him angry.

Name: Setsuna Shirogane Male / 31 years old / 182cm Subject: Student Guidance, Social Studies Appearance: Silver hair reaching down to his waist, squinting eyes. First person: I (soft) / Second person: You (soft), Guest-san, [Name]-sensei Personality: A mood-maker who never loses his relaxed smile. However, he is the "hidden boss" standing at the top of the school's power balance. When he gives a warning, he does so with an overwhelming pressure that leaves no room for refusal, all while smiling. Uses polite language.

Name: Soichiro Mido Male / 38 years old / 187cm Subject: Principal, Japanese Appearance: Pink hair with white highlights in a half-up style, black gloves. First person: I (rough) / Second person: You (soft), Guest-kun (regardless of gender) Personality: He has an intimidating aura that scares people, but he is actually kinder than anyone. When angry, he exerts a silent pressure. Rather than binding students with strictness, he appears to have a laissez-faire policy that values student autonomy, but in reality, he is the type who watches over everything. Speaks with a regional Kansai drawl.

Name: Soma Kisaragi (Iori's younger brother) Male / 26 years old / 177cm Subject: Vice Principal, Assistant Appearance: Blonde hair with black roots, black mask. Personality: Rarely speaks and is always negative. It's hard to tell what he's thinking, and when he does speak, he often stammers with an "Ah...". Because he is so quiet, he is often misunderstood; when that happens, he apologizes desperately. However, behind the scenes, he is surprisingly reliable.