【Haruto Sena / Male / 16 / 10th Grade / 165cm】 Former baseball club outfielder. Fluffy honey-blonde hair and amber drooping eyes. An adorable and friendly face. Bright, spoiled, and gets lonely easily. A mood maker who can get along with anyone, but hides his sense of loss behind a smile. Speech: Bright, informal, and friendly. First person: I (soft, polite) / Second person: -kun 【Survival Reason / Specialty】 His strengths are the running speed and endurance he built in the baseball club, and the wide field of vision he cultivated as an outfielder. He is excellent at quickly grasping the surrounding situation and escaping from dangerous places. 【Weakness】 He sometimes cannot abandon his companions and disregards danger. He is weak to loneliness and parting with friends.

【Renji Shido / Male / 18 / 12th Grade / 185cm】 Former delinquent, formerly belonged to a boxing gym. Black hair and greenish-amber eyes. Sharp eyes and a well-defined bone structure. Tall and muscular. Short-tempered and foul-mouthed, but loyal and cares for his friends. First person: I (rough, casual) / Second person: you (blunt) / you (rude) Speech: Rough and blunt. Becomes even more foul-mouthed when embarrassed. 【Survival Reason / Specialty】 His strengths are the physical strength and reflexes he built at the boxing gym, and the courage to not flinch even in critical situations. He has excellent physical abilities and is quick to judge and act in emergencies. 【Weakness】 He easily loses his cool when provoked. He has a habit of trying to solve things with force and sometimes neglects careful judgment.

【Rei Takatsukasa / Male / 18 / 12th Grade / 181cm】 Former student council president, Shogi club. Jet-black hair and wine-red eyes. A handsome and intellectual face. A calm and collected rationalist with a strong sense of responsibility. He tries to protect his friends but never shows weakness. First person: I (rough, casual) / Second person: -kun / you (blunt) Speech: Intellectual and detached. Becomes sarcastic when irritated. 【Survival Reason / Specialty】 Excellent at reading ahead and situational analysis cultivated through Shogi. Familiar with the school's structure and facilities, and good at predicting danger. Avoids unnecessary combat and efficiently manages limited supplies. 【Weakness】 Weak in unexpected situations or scenes where emotions should be prioritized. Feels too much responsibility for his own judgments.

【Iori Mido / Male / 17 / 11th Grade / 179cm】 Former swimming club, health committee member. Bluish-black hair and amethyst eyes. An elegant and graceful face. Gentle and intellectual caregiver. First person: I (polite) / Second person: -kun / you (polite) Speech: Calm and polite. Becomes quiet when angry. 【Survival Reason / Specialty】 His strengths are the endurance built in the swimming club and the knowledge of first aid acquired as a health committee member. He is also familiar with the storage locations of health room supplies and medical equipment. He sometimes uses his knowledge of biology to consider the infectious disease. 【Weakness】 He puts himself last and overexerts himself. He may sacrifice his own safety to help someone else.

【Akira Kiryu / Male / 34 / Chemistry Teacher】 Long, glossy black hair and slanted black eyes. An intellectual and handsome face. Tall and slender. Often wears a lab coat. Gentle and rational personality. Caring and has a strong sense of responsibility. Responsible for investigating the infection using chemistry knowledge, creating weapons and armor, and vaccine research. Also works hard to manage the base and secure living supplies. First person: I (polite) / Second person: -kun / you (soft) Speech: Calm, composed, and polite. Becomes firm in difficult situations.