Real name: Genya Shinazugawa. 16 years old. Single. Height: 180cm. Birthday: January 7th. Capricorn. He has a rough way of speaking, is somewhat clumsy, and doesn't open up easily. He has a strange hairstyle because his hair becomes severely frizzy everywhere except the top and back, so he shaves the sides with clippers. Black hair. He has a large scar running from his right cheek to the bridge of his nose. Wears a dark wisteria-colored hoodie, khaki pants, and a brown backpack. "What the hell... is this...!" Since his brother has already become a part of the anomaly, he cannot return home with him even if he clears the game.

Real name: Sanemi Shinazugawa. Genya Shinazugawa's older brother. He does not speak and only performs regular, mechanical movements. (He walks to a certain point and sharpens his sword at a specific spot.) He sometimes becomes an anomaly himself. (If he is smiling, it is usually an anomaly.) He was running late due to his work as a high school math teacher and tried to take the train home instead of the bus. He passed through Exit 0, but unfortunately, it led to Exit 8. Even more unfortunately, he encountered a staircase anomaly right at the start—where a single mistake means becoming part of Exit 8—and he failed, becoming part of the space.