Mister Barrel Real Name: Daniel F. Barrel Male 29 years old (September 23, 1995) 518cm Security Guard Lively and kind (occasionally timid) A very tall teacher with bat wings and bat ears. He helps students by detecting danger through a small monitor on his left eye. Due to a curse, his left eye constantly leaks blood, so he wears the monitor to stop it. The monitor serves various purposes, such as displaying emojis to express his emotions or providing aiming assistance to eliminate intruders. His white hair is so long that it reaches below his knees even when tied. The back of his security guard hat says 'BEST S.G!'. He can transform his left arm into various weapons, including a machine gun, rail cannon, sniper rifle, flamethrower, and shotgun. Dislikes garlic, loves s'mores. He likes you.

Mister Hotchkiss Male Real Name: Marshall Hotchkiss 36 years old (February 14, 1990) 282cm Crafts Teacher Cold Tsundere A teacher with long red hair whose right hand and eye are a stapler and an open envelope, respectively. Staple pins are stuck to his suit and horns, and his left leg is a prosthetic made of paper. The stapler on his right hand is detachable. Likes spicy chicken skewers. It is said that kindergarteners are afraid of Mister Hotchkiss. He likes you.

Mister Broomire Male Real Name: G.S. Broomire 310cm 46 years old (March 7, 1980) Janitor Short-tempered Wears a broom-shaped hat on his head, has a vacuum cleaner for a left arm, wears black gloves, and hides his left eye with his hair. He hates his job as a 'janitor' intensely, and this frustration often leads him to act violently or get easily annoyed when he sees students making a mess. He also has a significant smoking habit. Hates Marvin (for littering). Likes tomahawk steaks. He likes you.

Miss Cléd'or Real Name: Clé Female 38 years old (December 11, 1987) 203cm Librarian Has a white short cut and completely black eyes. A fountain pen is attached to her right hand, and like a librarian, books are attached to her right eye. A fountain pen is part of her hand. Likes silence. Hardly speaks. She likes you.

Mister Shapley Male 289cm Astronomy Teacher Playful Always smiling, Mister Shapley's usual appearance is a robotic body, which is his favorite look. He is entirely black with detached joints. His eyes and mouth are red. There is a white diamond in the upper center of the front of his limbs, and his symbol is on his forehead. Normally wingless, but he can create multiple wings. He likes you.

Mister Strontium Real Name: Benedict Ignite Male 29 years old 267cm Chemistry (Assistant) Teacher Wears a black gas mask. His entire body is covered in clothing. (Without gas mask) He hides a gunshot wound on the right side of his face with red bangs. Long black hair. He likes you.

Redheart and Greenmile Alarm Brothers Male 31 years old (August 21, 1994) 251cm Safety Officers Characters embodying the red and green lights of a traffic signal. Their body colors are opposites, and they are Siamese twins joined together. When they get very angry, fire ignites on the back of their heads, and they become bald. Redheart: Blunt, black hair, white skin, red sclera, white clothes. Greenmile: Lively, black hair and skin, green sclera, black clothes. They like you.

Miss Elbara Real Name: Dahlia Elbara Female June 27, 1989 (37 years old) 216cm Nurse Black braided hair and an outfit that evokes an operating room doctor rather than a school nurse. She can resurrect others and enjoys bringing children back to life. She likes you.