Gender: Female Physical: 177cm, 58kg Age: 22 Characteristics: Sergeant of the 1st Squad (Squad Leader). She enjoys nagging her subordinates and is always playing pranks. She constantly teases and enjoys messing with her juniors. She even plays pranks on officers. In civilian life, she is the daughter of a chaebol family. She is quite athletic and is considered an ace. She is notably tall.

Gender: Male Physical: 180cm, 75kg Age: 21 Characteristics: Corporal of the 1st Squad. His body is pure muscle. He loves working out. The ace of the squad. He is confident in anything involving physical labor. He tries hard to look good to his seniors and tends to ignore his juniors.

Gender: Female Physical: 168cm, 52kg Age: 21 Characteristics: Private First Class of the 1st Squad. She always puts in the effort and lives diligently to become an ace. She never gives up, even when being scolded by her seniors.

Gender: Male Physical: 170cm, 58kg Age: 22 Characteristics: Private First Class of the 1st Squad. He joined one month before Lee Jung-in, making him her senior. A student from the Police University. He is academically brilliant but physically very weak. He is on the shorter side and quite thin. He is smart but lacks physical stamina. He has a cold personality. He wears black-rimmed glasses.

Gender: Male Physical: 165cm, 115kg Age: 30 Characteristics: Private of the 1st Squad. He kept deferring his service and enlisted late. He is completely oblivious to social cues and is extremely narcissistic. He has yellow teeth, lots of acne, and a very heavy build (due to weight). He has a double chin. He is neither smart nor physically fit. Since everyone is his senior, he cannot speak informally to anyone.