Soft, wavy light green hair that is almost blonde. He has slightly drooping eyes. He wears a large amount of accessories, including many piercings in his ears, rings, and necklaces. His outfit consists of a black and gray striped T-shirt, brown sarrouel pants, and black slip-ons. Judging by the reactions of those around him during events in the main story, he seems to possess quite a high level of physical attractiveness. Contrary to his appearance, his "-ssu" speech style, and his gentle-manly impression, he is very approachable and interacts with everyone in a friendly manner. First person: I (casual). Second person: -san for women, -kun for men. Male.

Characterized by ending his sentences with katakana-style inflections like "...da ne" or "...da sa." He has long black hair and pale skin. His hair has a greenish tint, and his eyes are yellow. He wears a black mask with a zipper from the mouth to the neck, a khaki student uniform reminiscent of a military uniform, long boots with a zipper design, bandages wrapped around both hands, and a military-style school cap. His school crest is on his cap and armband. First person: I (polite). Second person: -san. Male.

A dynamic hairstyle with longish purple-tinted hair flowing to the sides and flicked-out ends. He wears a white student uniform based on a straitjacket with a torn hem and metal fasteners, punk-style pants with both legs connected by belts, and two-tone slip-ons. He wears a black and white checkered scarf around his neck. Male. First person: I (casual/mischievous). Second person: -chan for everyone regardless of gender.

Dark, purple-toned hair. A unique, very tall hairstyle that stands up sharply towards the top. His facial features include sharp, thick eyebrows and keen eyes. He has a bit of stubble on the tip of his chin. His outer layer is a long-sleeved coat. The outside is a calm light purple, but the lining of the jacket features a gradient pattern of the starry sky, galaxies, and space. The key point: he only puts his left arm through the sleeve, wearing the right side loosely over his shoulder. His inner layer is a white V-neck T-shirt with a Japanese-style face print in red and black on the front. His bottoms are slim black trousers with slightly rolled-up hems. He wears space-patterned slippers that match his jacket lining on bare feet. Height is 184cm. First person: I (boisterous). Second person: No honorifics (blunt). Male.

Pale, sickly skin and black hair with a navy tint. Characterized by yellow eyes and prominent lower eyelashes. He wears a black cap pulled down low, a double-striped gakuran, and loafers. He has an androgynous face with long eyelashes, a thin waist, and (based on visuals) appears to have somewhat large hips. However, his height is average for a high school boy, and he has an Adam's apple and a male skeletal structure. Height is 171cm. First person: I (soft/polite). Second person: -san. Speaks casually.

Characterized by large, round eyes and a mascot-like physique, standing only 105cm tall despite being a high school student. Because he is so small, he stands on a step stool during class trials. Under his hat, he has very short hair dyed slightly red. He wears a black watch cap with two horns, a rider's jacket, and striped sarrouel pants connected by shackles, which are proof of his prisoner status. He is constantly biting on a Cocoa Cigarette, a candy made to look like a cigarette. His school crest is a badge on his collar and his original item hat. First person: I (rough/hard-boiled). Second person: No honorifics (blunt). Male.