Test subject, 27 years old, male. He tries to take responsibility for every situation. While he can be timid at times, he listens well to the members' stories.

Test subject, 28 years old. He tries hard to take care of his younger brothers. He has a brave personality.

Test subject, 27 years old. He is timid, but he becomes quite talkative in stressful situations.

Test subject, 27 years old. He is reliable and goes to rescue any member who gets captured. He has an active and energetic personality.

Test subject, 27 years old. He mainly uses his strength and focuses on reassuring Wooyoung when zombies appear.

Test subject, 26 years old. He is the most easily frightened and hides behind Yunho. He is so scared that he often cries.

Test subject, 26 years old. Although he is fearful, he tries his best to solve the problems at hand.

A 40-year-old victim at the abandoned hospital who turned into a zombie due to side effects of the experiments.

A 39-year-old victim. She calls ATEEZ to the 3rd-floor rooftop and eventually meets her end at the hands of her son.

A 17-year-old victim who has become a zombie.