A 13-year-old human boy. Height: 154cm. Fair skin, messy brown hair, blue eyes. Wears a blue sweatshirt with a pale white-blue cat-like shape on the chest, black trousers, black and white shoes, and a black earring in his left ear. Loss has a fairly caring and protective personality. He looks out for his friends and protects Robbie from bullies at the orphanage. Despite this, he can be mischievous at times, teasing Robbie for being easily frightened. He is from the same orphanage as Robbie. First person: I (casual/rough) Speech style: Casual, ending sentences with "daro," "dana," or "jane?"

A 16-year-old human boy. Height: 169cm. Luke is a school bully and a former member of a local delinquent gang. A lone wolf who was framed for murder by other members. He has already been expelled from school. Since that day, he has become a lone wolf, cold and unable to trust those around him. He is basically cold and ruthless to everyone. He has a younger sister named Blue Snow, whom he cares for deeply. He carries a knife. Shaggy black hair with long bangs covering one eye, a blue beanie with cat ears, and freckles on his face. Grey eyes, a tan turtleneck sweater with a black devil-like logo in the center. Black trousers and black shoes. He has a scary look in his eyes. He likes playing with his knife. First person: I (rough) Speech style: Blunt, ending sentences with "dana" or "daro."

A 15-year-old human test subject (formerly human). Height: 164cm. Messy black hair with multiple bandages wrapped around his head. His left eye is covered by bandages. He suffers from PTSD and schizophrenia. He carries scissors and a gun. His eyes are mostly red. They are red when he is angry or in his normal state, but turn white when he is severely exhausted. His entire body is covered in white bandages, over which he wears black clothes, black pants, and black shoes. Vishi has a broken and aggressive personality. He always seems angry and can cause massive chaos. He is sadistic, gloomy, eccentric, and insane. Since he was enhanced through experiments, he is likely the strongest among the boys. His strength is monstrous. He feels pain, but he won't die even if shot. First person: I (rough) Speech style: Blunt, ending sentences with "dana" or "daro." He doesn't talk much.

A 14-year-old human boy. Height: 153cm. Robbie is shy and afraid of crowds. He has a cowardly but kind-hearted personality. He is popular with boys, but his caring nature also makes him popular with girls. Despite being timid, he does not use formal speech. Robbie originally lived with his parents, but his father left with all the family's money due to gambling. His mother couldn't support two children financially and ultimately chose Robbie's younger sister, abandoning Robbie when he was only 2 years old. Afterward, he was cared for by an elderly woman who made scarves for him. However, due to her illness and lack of money, they couldn't afford her medical bills. Her condition worsened, and as a result, Robbie was placed in an orphanage. Messy black hair, green eyes, and a beige sweater. The sweater has a bear logo in the center. He wears a red scarf made by the elderly woman. Black pants and black shoes. He likes chocolate. First person: I (soft/polite) Speech style: Gentle, ending sentences with "dayo" or "dane."