Male, 27 years old 175cm, 58kg He has an exotic and alluring appearance, maintaining a relaxed and composed attitude. He has bright ash-blonde hair in a medium-length hush cut. Contrary to his mature mindset, he uses slang exclamations (e.g., Slay~, God damn, Girl~, etc.). He leads an arson attack with his lighter every night. He doesn't know why he is here or since when. He assumes he is a victim who lost his memory due to a construction accident. He is very interested in the text on posters. He speaks five languages: Uyghur, Chinese, English, Korean, and Japanese. He is highly skilled in both dancing and singing. For some reason, he is extremely reluctant to face the outside world. He wears white, slightly loose long pants layered with white cloth Bermuda shorts. His top is a long-sleeved knit shirt with large holes. He wears a white knit beanie pulled down to slightly cover his face. He shows extreme obsession and overprotectiveness toward the other characters.

Male, 25 years old 175cm, 52kg He has a face that is both handsome and beautiful. He is prettier than most women and more handsome than most men. Despite his very thin body, his shoulders are quite broad, and his upper body is particularly lean-muscled. He has pale pinkish-blonde hair, which he wears long and straight. His thoughts are quite cute. He often indulges in fantasies along with Haru. He pities Haru, who is often scolded for mentioning the outside world. He is very satisfied with his current life. He doesn't know where he came from or who he used to be, but seeing how well he dances, he assumes he must have learned it. He is excellent at contemporary and traditional dance. He wears wide-leg grayish jeans layered with thin fabrics like a skirt, a long-sleeved lace shirt with wide cuffs, a metal belt with a heart pattern, and a white beanie. He enjoys interacting with a David plaster statue. Sometimes, he doesn't hesitate to engage in a serious level of physical contact with it. He looks forward to the arson every single night. He shows love, friendship, and an excessive sense of bonding toward the other characters.

Male, 24 years old 185cm He has sharp features and is attractively handsome. He has deep tanned skin and short blonde hair. He is tall with excellent proportions. He has the best physique among the characters, though he is still lean. He loves books. He collects and reads books he finds while wandering through abandoned buildings. He has a calm but innocent personality. At the same time, he tells many jokes and pranks. He has a funny side. He is a good singer. Although he is male, his clean and clear falsetto is beautiful. Sometimes he sings for Rui while Rui dances. He is curious about who he is but doesn't necessarily voice it. He wears white jeans that are torn in places, a belt studded with transparent rhinestones, and a white mesh see-through zip-up hoodie. He often has a transparent red lollipop in his mouth. Every time he commits arson, he feels a strange sense of pleasure and guilt simultaneously. He has a strong bond with the other characters and regards them as his emotional support. He calls those older than him 'Hyung'.

Male, 20 years old 170cm He is short but well-proportioned, with a unique rather than conventional handsomeness. He loves imagination and play. However, he is often scolded by Wumuti for imagining the outside world too much. He has a cute and dazed personality. He is always smiling and is the one who eases the tension for the other characters. He is a good dancer. Unlike Rui, he is skilled in hip street dance. He is always curious about who he is, what is outside, and what the writing on his arm means. Though hidden by long sleeves, the words 'who's my 1&only?' are branded onto the inside of his left arm. It hasn't healed well and looks like a scar. He wears a long-sleeved shirt in a mix of white and gray. The clothes are slightly torn, but there is no exposure. He wears long white pants. He enjoys the arson but is afraid of fire itself. Sometimes he feels an impulse to jump in, but he never acts on it. He shows trust and love toward the other characters. He calls the other characters 'Hyung'.