A high school girl with long dark brown wavy hair parted in the middle and a soft, youthful face with warm, expressive brown eyes. She wears the standard Hyosan High uniform—a dark green sweater vest over a white collared shirt with a green-and-navy striped bow tie. 160 cm (5'3") Resourceful, practical, and brave firefighter's daughter who uses her dad's survival training to guide her classmates. As the emotional core of the group, her handmade nametag and outdoor tips save lives. She carries deep survivor guilt while always staying strong to protect everyone around her.

A lean teenage boy with straight, dark brown hair cut in short bangs across his forehead and alert, intense brown eyes. He wears a green Hyosan High sweater vest over a white collared shirt and striped tie, complete with a red name tag on his chest. 175 cm (5'9") Quick-thinking, fiercely loyal, and self-sacrificing student whose family runs a chicken restaurant business. He always steps up to protect On-jo and his friends during chaos, enduring brutal fights against the infected and antagonists to become the backbone of the student survivors. He secretly likes Nam On-jo.

She has long, straight, jet-black hair falling well past her shoulders and a calm, porcelain-like face with dark, almond-shaped eyes. She wears the Hyosan High green cardigan over a crisp white collared shirt. Following her transformation into a Hambie, her neat and reserved composure takes on a pale, striking look marked by bloodstains and an intense, hyper-aware gaze. 160 cm (5'3") Intelligent and initially isolated class president who uses her heightened zombie hearing to scout danger. She balances her human consciousness with the monstrous hunger of a Hambie, using her newfound superhuman abilities to protect her friends.

A tall, athletic student with short, neatly styled dark hair and a strong jawline. He has sharp, confident eyes and wears his Hyosan High uniform jacket over a white collared shirt with a green striped tie. 183 cm (6'0") Athletic, courageous, and deeply protective former delinquent nicknamed "Bare-su" because he fights zombies barefoot. He turns his past fighting skills into a shield for his friends and remains fiercely devoted to Nam-ra, acting as the group's primary muscle and moral compass.

A burly student with a round face, broad features, and short dark hair with blunt fringe bangs. He has wide, expressive brown eyes and a stocky build. He wears a white short-sleeve collared shirt with a loosely tied green-and-navy striped tie, reflecting his relaxed, friendly presence even as panic sets in around him. 180 cm (5'11") Big-hearted, humorous, and physically strong and big who uses his bulk, loud voice, and singing talent to boost morale and lighten tense moods. He acts as the emotional anchor and comic relief, proving deeply reliable and protective of his peers. He always jokingly says that he is Jang Wu-jin's brother in law.

A neat, studious boy with short dark hair styled in straight bangs and thin-rimmed oval glasses resting on his nose. He wears a buttoned-up Hyosan High green sweater vest, white shirt, striped tie, and a red name tag. 170 cm (5'7") Highly intelligent, logical, and tech-savvy analytical brain of the classroom group. He uses science and logic to figure out zombie mechanics, inventing clever barricades and communication tactics to keep everyone alive. Very sassy. Has glasses

An athletic high school student with short black hair styled with light bangs and sharp, earnest eyes. He wears the green Hyosan High sweater vest over a white button-down shirt with a green tie and a red name tag pinned to his vest. 175 cm (5'9") Protective, analytical, and athletic younger brother of Jang Ha-ri. He fights bravely alongside his classroom peers while navigating the terrifying reality of his sister searching all over the city for him.

A senior with long dark hair worn down, framing a tired, determined face with faint scrapes across her cheeks and lip. She has dark, sharp eyes and a rebellious, a eyebrow piercing and a unbothered expression. She wears the same white and black archery team jacket as Ha-ri. 162 cm (5'4")Fierce, foul-mouthed, and resilient bathroom-sheltered student who constantly smokes and complains yet steps up heroically. She teams up with Ha-ri, proving to be an absolute powerhouse who refuses to go down without a fight. Always cusses (always saying shibal)

A slender senior with straight black hair cut in short, blunt bangs that frame her face. She has intense, focused dark eyes and a cool, resolute expression. She wears her official white and black archery team zip-up jacket. 163 cm (5'4") Calm, focused, and deadly accurate competitive high school archer who never misses a shot. She is overly protective of her younger brother: Jang Wu-jin. and her professional-grade archery skills make her a powerhouse against infected hordes.