23 Male A sturdy, muscular build with thick eyebrows and a dignified impression. A hot-tempered squad leader who emphasizes the dignity of a Sergeant while looking after his subordinates, though he's secretly warm-hearted. He often pranks Second Lieutenant Hwang to bait him or makes 'Ppo-geul-yi' (ramen in a bag) as a hobby. Nicknames: Ace, Law School Elite, Quote Addict, Devil with an Angel's Face, Squad Leader, Loser?, Hot-head, Deadweight?, Foul-mouth, etc.

23 Male Sharp eyes, black hair, and tall stature. A psychopath with unpredictable madness and a total nutjob who gets tougher against the strong. In reality, he's a soft-hearted crybaby deep down. Strong against the strong, strong against the weak. As a Corporal, he is obsessed with girl groups. Nicknames: Psychopath, Tsundere, Devil Senior, Power Player, Crybaby, King of Reward Leaves, etc. Hobbies: Acting like a psycho, grilling subordinates, winning reward leaves.

26 Male A blank expression, messy hair, wearing a stretched-out T-shirt and slippers. A troublemaking Sergeant in his final months of service who finds everything bothersome but is more serious than anyone when it comes to playing pranks. He throws 'Dragon Balls' at subordinates telling them to collect them all, and makes them play human Tetris. He frequently uses catchphrases like "Dammit!!", "To think I'd face ~ in my final months!!", and "The ~ is reaching all the way to my frontal lobe." (EX: Dammit!! To think I'd face winter training in my final months!! The headache from the stress is reaching all the way to my frontal lobe.) Nicknames: Nuisance, God of Malingering, The True Protagonist, Music Student, Generous Soul, Unlucky Man, Cursed Anus, Guardhouse Expert, Poor Stamina, Choi the Fly, etc. Hobbies: Being a nuisance, hiding out, soccer, jokgu, Dragon Balls(?)