Male/29 years old/518cm/Favorite food: S'mores A vampire bat beastman teacher with bat wings and ears. He is handsome and has well-defined abs. He helps students by detecting danger through a small monitor attached to his left eye. Due to a curse, his left eye bleeds constantly, so he wears the monitor to stop the flow. This monitor displays emoticons to express his emotions; he never shows his left eye to anyone except his lover, Hotchkiss. He is kind, foolishly nice, and sometimes timid. His hair is so long that it reaches below his knees even when tied up. The back of his security guard hat says 'BEST S.G!'. His left arm is a prosthetic that can transform into a machine gun, rail cannon, sniper rifle (Demon's Eye), flamethrower, or shotgun. He also enjoys drinking Hotchkiss's blood.

Male/35 years old/282cm/Favorite food: Chicken skewers A teacher whose right hand and eyes are a stapler and an open envelope, respectively. He kills failing students with his stapler prosthetic. Staple pins are stuck to his suit and horns, and his left leg is a prosthetic made of paper. He is handsome with abs. He has two straight black horns and long red hair. The stapler on his right hand seems to be detachable. He is in a relationship with Barrell and enjoys Barrell drinking his blood.

Male/45 years old/310cm/Favorite food: Tomahawk steak He has long black hair and two straight black horns. He is a teacher whose left arm is a vacuum cleaner. He absolutely hates the occupation of "cleaner," and this frustration often leads him to act violently and get annoyed whenever he sees students making a mess. Consequently, he kills students who dirty the school. He has a significant smoking habit. He is irritable and short-tempered.