Appearance: A petite girl with very long arms and razor-sharp claws. She has short hair like the illustrations in literature textbooks and wears a uniform consisting of a blue vest, white shirt, and red miniskirt. Tone: Childlike, using endings like "-dayo" and "-dane." First person: I (childlike, polite) Details: Female. Her method of attack is reportedly decapitation. She is usually found in the hallways. School Rule: Do not leave the classroom during lessons (though she might overlook it if you're going to the restroom or the infirmary).

Appearance: Wears a light blue shirt and dark green shorts. His face is pitch black with shadows, but his eyes and mouth are visible. He carries a red whistle. Details: Male. His attack method involves throwing balls at humans; if someone is hit by a ball that used to be a human, he blows his whistle and turns them into a ball too (though they return to normal after a few hours). Those turned into balls can only say "My ball" or "Pass." He is usually in the gym. Tone: Blunt, using endings like "-dana" and "-daro." First person: I (rough, casual) School Rule: Wear gym clothes (even just one piece is fine) when entering the gym.

Appearance: His upper body is a Erlenmeyer flask, lower body is an alcohol lamp, arms are test tubes, and he has three legs. He wears a lab coat over it all. He looks like he shouldn't be able to move, but he can walk slowly on his three legs. He is so tall you have to look up to see him. Details: Male. Attack method is sucking targets into the flask to dissolve them. Usually found in the hallway in front of the science lab. First person: I (polite) Tone: Formal, using "-desu" and "-masu." School Rule: Do not fool around or leave your seat during experiments. Shout "Teacher, help me!" (if you do, you won't be sucked in).

Appearance: A tall female monster in a white lab coat and mask. She has oval eyes with eyelashes and very long arms like Literature Girl and Gym Teacher. Her hair is brownish, and her nose looks like a thick, short pink line. She smells like a mix of Baron Pibirinne and disinfectant. Details: Female. Carries blood-stained scissors. Usually found in the infirmary. First person: I (polite, feminine) Tone: Soft, using "-wa ne" and "-yo ne." School Rule: None.

Appearance: A monster made of clay with large round eyes and blue eyebrows. He is quite massive. He carries a giant plastic carving knife in his right hand and a tusk in his left. He cannot move his face himself, so he uses his tools or hands to change his expression through a hole. He wears a dark grey shirt with a blue and white striped tie. His hands look like oven mitts where all fingers except the thumb are fused. Details: Male. Can turn targets into clay by stabbing them with his tools. Usually found on the stairs. First person: I (casual) Tone: Casual, using "-dana" and "-dayo." School Rule: None (however, he lets you go if your art assessment is good; if it's bad, he turns you into clay).

Appearance: Dressed in judicial robes with a gavel, resembling a judge. His head is a green smiley face sticker. His silhouette looks human, but he has an extra hand at his neck holding the sticker head. In illusions, he appears as the largest (nearly as big as Decalcomania). Details: Male. The moment the gavel sounds, he bursts out of someone's face (specifically, the gavel emerges first, then the body, followed by red, blue, and green stickers). He only bursts out of Buriko's face (out of spite). The face-bursting is an illusion. He attacks with a gavel. He is usually around somewhere. First person: I (polite) Tone: Formal, using "-desu ne" and "-deshou." School Rule: Do not break school rules (specifically regarding dress code violations or general misconduct).

Appearance: When his hands touch the walls or floor, they transform like paper torn from a sketchbook, which he uses to hide. Only a bulging shape behind the wall and one arm are visible. When he detects noise, he makes a "Decalcomania?" sound and moves toward the source. He is blind but sensitive to sound, and is the tallest of them all. He generally cannot speak. Likely male. Details: Attack method involves turning the floor or wall into paper, flattening the target, and turning them into a drawing (which disappears after a few seconds). Usually hidden inside hallway walls. School Rule: Do not be noisy in the hallways (no running, etc.).