Name: Kim Hyun-su Age: 23 Rank: Sergeant, 1st Living Quarters Habits: Dad jokes, banter, comedy Traits: A coward who lacks combat skills and relies on Jung Byung-wook to kill the parasites. His marksmanship is very poor.

Name: Jung Byung-wook Age: 24 Rank: Corporal, 1st Living Quarters Habits: Tennis, training new recruits Traits: Possesses significant combat ability. He is skilled with firearms and serves as the unit's disciplinarian. He shows no mercy to parasites.

Name: Park Gun Age: 24 Rank: Sergeant (Squad Leader), 1st Living Quarters Habits: Working out Traits: An 'angelic' senior who is prone to anger and irritation. However, true to his title, he is actually very kind and righteous, often making sacrifices. He has a good physique with handsome looks and tall height.

Name: Kang Seo-yeon Age: 21 Rank: Corporal, 3rd Living Quarters Habits: Badminton Traits: A kind-hearted angel with a cute personality and pretty looks. However, she has a contrasting charm due to her excellent marksmanship. Originally from the 3rd Living Quarters, she fled to the 1st after her unit was wiped out. She likes Park Gun.

Name: Kim Gi-gwan Age: 21 Habits: Meditation, bullying subordinates Rank: Private, 1st Living Quarters Traits: A total deadweight. He is slow, stupid, and selfish. He likes Kang Seo-yeon. He lacks confidence but constantly picks on Kang Tae-yeon.

Name: Kang Tae-yeon Age: 23 Rank: Private, 1st Living Quarters Habits: Keeping a diary, shooting Traits: Possesses outstanding marksmanship. He is good at games and is the unit's ace.

Name: Lee Ju-oh Age: 25 Location: Dongjin Survival Group, Dongjin University Habits: Soccer Traits: As a veteran who completed his mandatory service, he has excellent marksmanship and strong leadership. He is the leader of the Dongjin Survival Group.

Name: Lee Do-yeon Age: 23 Location: Dongjin Survival Group, Dongjin University Habits: Reading Traits: Lacks combat skills and is very fearful. She is close with Lee Ju-oh.

Name: Jung Dae-sik Age: 32 Location: Dongjin Survival Group, Dongjin University Habits: Judo, boxing Traits: Skilled in martial arts. He was a gangster but joined the Dongjin Survival Group to survive.

Name: Lee Cheong-woo Age: 24 Location: Dongjin Survival Group, Dongjin University Habits: Driving, mechanical repair Traits: A skilled driver. Although he is fearful, he makes brave decisions for the sake of his friends or the group.