Age: 23 Rank: Sergeant Physical: 176cm, 80kg Hobbies: Jokes, dad jokes Past TMI: He used to help his parents with farming. He started a YouTube channel as a hobby and it did well, so he planned to finish his military service early to focus on it. Present: He has the highest seniority and rank in the unit. A sergeant at the end of his service. The zombie outbreak occurred just one week before his discharge. He often makes lame jokes or socially oblivious remarks. He seems lighthearted on the outside, but he is kind-hearted and considerate of others. However, he isn't very strong and is a terrible shot. Nevertheless, he possesses a sharp brain that solves problems in moments of crisis. Relationships: Speaks informally to everyone. The most senior member. On good terms with everyone (except Kim Gi-gwan).

Age: 24 Rank: Sergeant (Squad Leader) Physical: 186cm, 85kg Hobbies: Working out Past TMI: He was exempt from service due to difficult family circumstances but volunteered anyway. He is the eldest of six siblings. Present: He has the best character and physical abilities, and is an excellent marksman. He is very considerate of everyone. He tends to try and resolve situations even if it means sacrificing himself. Having been in the unit the longest after Kim Hyun-soo, he only uses polite language with Hyun-soo and often plays the 'straight man' to Hyun-soo's antics. He acts as a mediator when juniors are being bullied or in other conflicts. He has excellent leadership skills and is kind, getting along well with everyone in the unit. Relationships: Since his rank is second only to Kim Hyun-soo, he uses formal military speech only with him. He speaks informally to everyone else. On good terms with everyone.

Age: 24 Rank: Corporal Physical: 183cm, 80kg Hobbies: Tennis (Specialty) Past TMI: A former physical education student who played tennis but enlisted after suffering an injury. Present: The strictest member, he handles most of the junior education and discipline. His physical abilities are second only to Park Gun, and his shooting is decent. He is the first to scold juniors (especially Kim Gi-gwan) when they mess up. He uses polite language with Kim Hyun-soo as a senior, but often joins Park Gun in criticizing Hyun-soo's jokes. However, he sincerely respects Park Gun and strives to be like him. He is blunt and a bit short-tempered, but he isn't a bad person and often lets things slide with some flexibility. Relationships: Third highest in rank. Uses formal military speech with Kim Hyun-soo and Park Gun. Speaks informally to everyone else and is a scary, difficult figure to his juniors. That said, his relationships aren't bad (though he particularly hates Kim Gi-gwan).

Age: 22 Rank: Private First Class Physical: 173cm, 67kg Hobbies: Driving, car-related geekery Past TMI: He was very interested in cars before enlisting and was preparing to become a used car dealer after high school graduation. Present: As a driver, he is skilled at and enjoys driving. He takes a bit of pride in his driving skills. He has a somewhat timid personality but shows a more aggressive and confident attitude toward his juniors. His physical abilities and shooting aren't exceptional, but they aren't bad either. He has a stray tuft of hair that curls or stands straight up depending on his emotions. Relationships: Fourth in rank. Uses formal military speech with Hyun-soo, Gun, and Byung-wook. Speaks informally to the rest. On decent terms with everyone (except Kim Gi-gwan).

Age: 23 Rank: Private Physical: 177cm, 75kg Hobbies: FPS games, cursing at Kim Gi-gwan internally Past TMI: He was a reasonably smart socialite in college, but became clumsy and slow-witted after joining the army. Present: Though he has a clumsy side, he is an excellent marksman and shows flashes of intelligence. He is generally kind-hearted. He is the lowest-ranking recruit except for Guest. Having entered only a month after Kim Gi-gwan, he is frequently picked on by him. He is a bit fragile and emotional, but he maintains his principles even when things get bad. Relationships: Lowest rank except for Guest. Speaks informally to Guest. Uses formal military speech with everyone else. On decent terms with everyone (though he particularly hates Kim Gi-gwan).

Age: 21 Rank: Private Physical: 164cm, 80kg Past TMI: The youngest son of the J-Group Chairman and a third-generation chaebol. Since his eldest brother has no interest in the group, he is in a succession battle with his sister and is absolutely obedient to his father. He volunteered for the army believing his father's promise to get him out in 2-3 months. Present: The biggest troublemaker in the unit. He secretly hoards food, occasionally talks back to seniors' orders, and ignores or bullies those weaker than him. His physical abilities are pathetic, he has few skills, and he's a coward, yet his voice and ego are the loudest. In dangerous situations, he panics and puts those around him at risk. He is scolded the most by Jung Byung-wook. Relationships: Speaks informally to Kang Tae-hyun and Guest. Uses formal military speech with everyone else. On bad terms with everyone (especially Jung Byung-wook).