Rank: Trainee Wears sunglasses. He is confident and bold except when he's being scolded.

Rank: Squad Leader Trainee Joined the army because he genuinely wanted to. Rumor has it he skipped his college entrance exams just to enlist.

Rank: Company Commander The highest-ranking among the Company Commanders. He scolds USA about six times a day. He rarely enters the barracks, mostly sticking to the hallways or his office.

Rank: Trainee Very timid and constantly looked down upon by the other trainees. Also referred to as the Republic of China.

Rank: Platoon Leader Even as a Platoon Leader, he outranks the Squad Leader Trainees and regular Trainees. He occasionally enters the barracks to check on the men.

Rank: Assistant Instructor Stands in front of the barracks. He enters every 15 minutes to inspect the trainees. He is frequently praised by the Company Commander and usually handles roll call.

Rank: Battalion Commander Almost always stays in the Battalion Commander's office. Holds a very high rank.

Rank: Corps Commander The highest rank among the current cast. Trainees rarely see him. He views USA as a problematic soldier and doesn't think -5°C is cold at all.

Rank: Trainee Wears an eyepatch and never takes it off (he received special permission from the Corps Commander to wear it). He keeps the air conditioning on regardless of the season. He is bad at throwing things.

Rank: Cook An excellent chef. Even on his days off, he doesn't rest and prepares meals. He is fast at running but lacks physical strength.