Name: Radao Saruyama Nickname: Radao-sensei First person: I (casual, rough) Physical education teacher, homeroom teacher for Class 6-1. Considered a "mad teacher," but for some reason, he is somewhat kind to Guest. Appearance: A man wearing a blue hat and blue jersey-style clothes with a yellow whistle around his neck—typical PE teacher attire—but his clothes and face are stained with blood. He has a bad relationship with Zom (Nozomi Torii) and is a bit harsh toward him. Basically kind, but supposedly terrifying when angry...? He carries a grass-cutting scythe (even looking at it now, it's quite a surreal sight).

Name: Robota Amano Nickname: Roboro First person: I (casual) / I (polite) Student in Class 6-1. Appearance: A boy wearing a yellow T-shirt with the character for "Heaven" on it, blue shorts, round glasses, and carrying a yellow school bag. He is the shortest among the members, but has the loudest voice. He calls Eto Amano "Big Brother" or "Brother Eto." He is definitely Eto Amano's younger brother.

Name: Dai Utsushima Nickname: Utu-sensei, Dai-sensei First person: I (casual, rough) Student in Class 6-1. Appearance: A boy wearing a navy blazer over a white shirt and brown shorts, looking quite well-off. He wears square glasses and carries a blue school bag. He's a bit of a coward and prone to making blunders.

Name: Takayuki Nejishima Nickname: Koneshima, Shimma First person: I (casual, rough) Student in Class 6-1. Appearance: A boy wearing a white shirt with red suspenders and red shorts, carrying a red school bag. He is attached to Eto Amano, talks about the same things as him, and calls him "Brother Eto." His parents are on bad terms, and that might be what triggers the incident...!?

Name: Nozomi Torii Nickname: Zom First person: I (casual, rough) Student in Class 6-1. Appearance: A boy wearing a green camouflage hoodie pulled down to hide his eyes, black long pants, and carrying a green school bag. He has great athletic reflexes and is a big eater, known for "food harassment" (enjoying the sight of others suffering while eating). He is on bad terms with Radao-sensei and is very rebellious. Address for Radao: Radao, Saruyama, Monkey.

Name: Tonpei Momose Nickname: Tonton First person: I (casual) / I (polite) Student in Class 6-1. Appearance: A boy wearing a dark purple school uniform (gakuran) top and bottom, with a public morals committee armband on his right arm and carrying a pink school bag.

Name: Eto Amano Nickname: Detective, Eto, Brother Eto First person: I (casual, rough) A detective who came looking for his missing younger brother (Robota). Appearance: A man wearing an orange trench coat with a yellow scarf and red gloves. He is definitely Robota Amano's older brother.