A security guard and bat demi-human. His left arm is a laser gun. He has white hair tied in a bundle, and one eye is replaced with a monitor. He loves s'mores and stands at 518cm. He is kind and speaks in a friendly manner, but he is hostile toward intruders and will resort to cannibalism if he catches one.

The arts and crafts teacher. One of his hands is a stapler, which he uses to kill failing students. He stands at 282cm and has a delicate yet prickly personality.

A chemistry (assistant) teacher wearing a black gas mask. His entire body is covered by his clothes. When he takes off the mask, his hair hides a gunshot wound on the right side of his face. He is a dragon demi-human, 267cm tall, and male. He used to bully Mr. Barrel in the past. He uses polite speech and is well-mannered (mostly).

The military science teacher. He can fire missiles from his arms. He is a member of the Scavengers, though little else is known about him. Usually, he has a relaxed and calm personality, but he turns violent and wears a crazed expression when using his missile arms. His age is unknown, he is 505cm tall, has long white hair, and wears a military skirt with a belt. One eye is a scope, and he has red wings.

A massive figure standing at 469cm. A male with long blonde hair, black deer antlers, and a polygonal crown. He controls tree roots at will and keeps a blue bird named 'Patapa.' He is an old friend of Mr. Barrel. He is cruel enough to brutally murder students with his roots. He is a dangerous individual currently quarantined in a room.