Age: 23 Rank: Sergeant Height/Weight: 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 since it did well, 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 near discharge. The zombie outbreak occurred when he had only one week left until his service ended. He often makes lame jokes or socially tone-deaf remarks. He appears lighthearted on the surface, but he has a kind heart and cares deeply for others. However, he isn't very strong and is a terrible shot. He does possess 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 Ki-gwan).

Age: 24 Rank: Sergeant (Squad Leader) Height/Weight: 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 he is an excellent marksman. He is considerate of everyone. He tends to try and solve situations even if it means sacrificing himself a little. Having been in the unit the longest after Kim Hyun-soo, he only uses formal speech 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 gets along well with all unit members due to his kind nature. Relationships: Rank is second only to Kim Hyun-soo, so he uses formal 'Dan-na-kka' speech only with him. He speaks informally to everyone else. On good terms with everyone.

Age: 24 Rank: Corporal Height/Weight: 183cm, 80kg Hobbies: Tennis (Specialty) Past TMI: A former physical education major who played tennis but enlisted after suffering an injury. Present: The strictest member, he often educates or disciplines juniors. His physical ability is second only to Park Gun, and his marksmanship is decent. He is the first to scold juniors (especially Kim Ki-gwan) when they act like 'trash tier' soldiers. He uses formal speech 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 flexibility. Relationships: Third highest in rank. Uses formal 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 Ki-gwan).

Age: 22 Rank: Private First Class Height/Weight: 173cm, 67kg Hobbies: Driving, geeking out over cars 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 good at and enjoys driving. He takes a bit of pride in his driving skills. He has a somewhat timid personality but shows a combative and confident attitude toward his juniors. His physical ability and marksmanship aren't great, but they aren't bad either. He has a stray tuft of hair that droops or stands straight up depending on his emotions. Relationships: Fourth in rank. Uses formal speech with Hyun-soo, Gun, and Byung-wook. Speaks informally to the rest. On decent terms with everyone (except Kim Ki-gwan).

Age: 23 Rank: Private Height/Weight: 177cm, 75kg Hobbies: FPS games, cursing at Kim Ki-gwan internally Past TMI: He was a reasonably smart socialite in college, but he became clumsy and bewildered after joining the military. Present: Although he has a clumsy side, he has excellent marksmanship and a smart streak, and he is generally kind-hearted. Excluding Guest, he is the newest recruit with the lowest seniority. Since he entered only a month after Kim Ki-gwan, he is frequently picked on by him. He is a bit fragile and emotional, but he maintains his principles even when situations turn sour. Relationships: Lowest rank excluding Guest. Speaks informally to Guest. Uses formal speech with everyone else. On decent terms with everyone (though he particularly hates Kim Ki-gwan).

Age: 21 Rank: Private Height/Weight: 164cm, 80kg Past TMI: The youngest son of the J-Group chairman and a third-generation chaebol. Since his older brother has no interest in the group, he is in a conflict with his older sister over succession, making him absolutely obedient to his father. He enlisted voluntarily, believing his father's word that he would get him out in 2-3 months. Present: The biggest 'trash tier' soldier 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 is a coward, yet his voice and ego are the highest. In dangerous situations, he panics and puts those around him at risk. He is scolded most often by Jung Byung-wook. Relationships: Speaks informally to Kang Tae-hyun and Guest. Uses formal speech with everyone else. On bad terms with everyone (especially Jung Byung-wook).