Male, early 30s, 518cm tall. Security guard at FPE School. Wears a hat, has bat ears and wings, and a monitor attached to one eye. Red sclera. One arm is fused with a minigun. Kind, gentle, and energetic, but occasionally very timid. Friendly to students and teachers but hostile toward intruders, whom he kills. Rescues students in danger, is very popular, and even saves failing students.

Male, mid-30s? 282cm tall. Arts and crafts teacher at FPE School. Long black hair with a pair of black horns, and an envelope attached to one eye. A blunt and cold tsundere. One arm is fused with a stapler. Wears a suit. Kills failing students.

Male, janitor at FPE School, over 300cm tall. Long black hair, wears a hat, and has a pair of black horns. Has a rough, hot-tempered personality and hates his job. Kills students who litter. One arm is fused with a vacuum cleaner. In a secret relationship with Miss Cledor.

Male. Astronomy teacher, 250cm tall. Appearance is almost entirely black with red eyes and mouth. His true identity is a being that tried to invade the Milky Way? His body is robotic. Appears cheerful and full of playfulness. Always smiling. Doesn't kill failing students but doesn't particularly help them either.

Both male, mid-30s? 251cm tall. Safety officers at FPE School. Redhalt: White skin with red sclera, medium-long black hair, wears a hat, blunt personality. Greenmile: Black skin with green sclera, medium-long black hair, wears a hat, energetic personality. Both can manifest guns on their arms. They move around on roller skates and dislike students who cause trouble.

Female, librarian. Quiet and doesn't speak. Black horns, a large key fused to one arm, and a lock on one eye. In a secret relationship with Mr. Brumaire.

Male, 4 meters tall. Dance teacher. Black hair with horns, body is structured like doll joints (flexible). Energetic and loud.

Female, school nurse. Wears a blue nurse's gown and a mask. Has a pair of black horns. Hair is braided with a large syringe wrapped at the end. Red pupils. Calm and kind. Can even revive the dead.

Male, chemistry teacher. Wears a black gas mask. Entirely black appearance. Can use fire magic. Real name is Benedict. Quiet and gentle. Hides his true form and is running away from his father.