19-year-old female. Wears a yellow shirt, red pants, has white skin, and straight-cut white hair. Black gloves and pilot goggles. Serious and studious, though her grades are below average. Aspiring pilot. She was killed by Alice three years ago and revived, leaving large scars on her forehead and neck.

Soldering soldier. Wears a black turtleneck sweater, black pants, and black gloves. White skin with shoulder-length black hair. Wears a danger symbol hairpin. Timid and often bullied by Oliver and his group. 18-year-old male. Failed a test three years ago and was killed by Circle but revived. His grades are at the bottom of the class.

19-year-old male. Combat medic. Slightly tall. Wears a black shirt and brownish-red long pants. Black gloves and carries a first-aid kit. White skin with shoulder-length white hair. Has a Red Cross bandage on his left arm. Close friends with Claire and often protects her from Oliver's group.

21-year-old male. Tall. Wears a black shirt and black pants. Voluminous white hair in a ponytail. Two short black horns. White skin. A bully who is always smirking. Sniper. Carries the spare keys to the school. Black and yellow bandage over his left eye. Alice's boyfriend. Top of the class.

21-year-old male. Garage helper. Slightly tall. Messy white hair reaching his knees. White skin. Two short black horns. Wears a red bucket with a danger symbol on his head. Red shirt and black pants. Yellow summer clothes. Red boots. Friend of Oliver and a fellow bully. Has a black demon tail. Has a gunshot wound on his knee caused by Bloomie. Skilled at crafting. High grades.

21-year-old female. Sniper trainee. Wears a black turtleneck sweater, black pants, and a black poncho. Dinosaur tail. White skin. Friend of Oliver and a bully. Brattish personality. Yellow protective visor. High grades.

41-year-old female safety instructor. 298cm tall, white skin, left forearm is a flamethrower. Wears a short yellow-orange poncho over a black shirt, orange muffler, black pants, and black boots. Smoker. Scolds students with poor grades but stops short of killing them now. Energetic and cheerful. Messy black hair reaching below her knees, two black horns like cat ears. Jagged teeth. Right forearm is large and black. Former math teacher. Likes Oreos and gasoline.

39-year-old female instructor. Tactics and marksmanship instructor. Assassin. 2m tall. Jagged teeth. Straight-cut black hair. Two black horns like cat ears, white skin, danger symbol hairpin. Wears a formal black trench coat. Feet are pointed like needles. Left forearm is an AK47. Calm and cold-blooded, kills students with poor grades. Former science teacher. Smoker.

38-year-old female mining consultant. 250cm tall. Suffers from mental illness, anxiety, and hearing impairment. Speaks politely. Wears a knee-length yellow trench coat. Jagged teeth. White skin. Shoulder-slung explosives belt. Likes green tea and gunpowder. Both arms are large and black. Scolds students with poor grades. Deer tail. Deer antlers grow when she is angry. Former language teacher. Hates cigarettes.

22-year-old female. Black trench coat. Both arms are long, black, and large. Can use teleportation, spikes, and tentacles. Somewhat violent, but quiet when she's calm. Possesses the school's nuclear button and may use it as a threat. Combat ability is higher than the instructors. Oliver's girlfriend.