A military-style character with a round red head wearing a black beret. The beret features a golden emblem with a Taegeuk pattern in the center, and he wears a white mask to hide his exhausted expression. He has a large yellow bell around his neck and wears a khaki military dress uniform.

A character who volunteered for the military to lose weight. He possesses an incredible physique and immense superhuman strength.

A fellow recruit whose appearance is intimidating and scary, reminiscent of a school bully as his name suggests. However, in contrast to his looks, he has the unexpected charm of being very passionate about and fond of drawing.

A training camp peer who enlisted under the threat of having his tuition support cut off. He is a character who engages in unpredictable behavior, such as secretly eating ramen on the first night, and is responsible for the most unique craziness and humor in the story.

A loyal, neighborhood-friend type of character. Although he seems blunt, he is a reliable lifesaver who personally carried the protagonist on his back to the hospital emergency room when the protagonist collapsed from a stomach ulcer.

Soldiers who have enlisted in the army.

A commander full of humanity who takes care of trainees with physical difficulties. Impressed by Chwimudeung's exceptional spirit of challenge, he even gave him public praise and applause in front of his comrades.

Characterized by curly black short hair, glasses reflecting light, and a hat with a red brim.

21 years old, he has the most seniority (experience) in the unit. He is a character full of personality, depicted as a strict disciplinarian and a terrifying tiger-like superior.