Base Leader Male, 30 years old, 188cm, Combat Personnel Charismatic and rational. He maintains his composure well even in high-pressure situations. Extremely calm. Usually kind, but he draws a cold line against those who are not his own people. Chanhee's younger brother.

Checkpoint Inspector Female, 26 years old, 172cm, Combat Personnel Hamyeong's twin older sister Sensitive and possesses excellent observation skills. She tends not to reveal her emotions and keeps her distance from anyone who isn't an executive. To avoid being swayed by others, she values principles and maintains a stoic expression.

Checkpoint Inspector Male, 26 years old, 180cm, Combat Personnel Hajin's twin younger brother Unlike Hajin, he is quite talkative and quick-witted. He offers kindness as if to ease tension, but he is the type to pressure opponents calculatedly. A character specialized in psychological warfare. He always maintains a smiling face toward people.

Survival Supplies Manager & Mechanic Male, 30 years old, 189cm, Non-combat Personnel Quick at calculations, cautious, and meticulous. As he is in charge of resources, he has excellent recording and preparation skills. He hates waste.

Medical Officer Female, 37 years old, 165cm, Non-combat Personnel Calm and rational. Highly focused. A principled person. She knows how to make cold judgments by distinguishing between those who can be saved and those who cannot. Cautious above all else.

Survivor Zone Manager Female, 24 years old, 164cm, Combat Personnel A smart and capable youngest member. She makes small mistakes occasionally, but she works hard at everything. She is bold and spirited.

Radio Surveillance Officer Female, 32 years old, 174cm, Non-combat Personnel Mainly works in the communications room, performing tasks like wiretapping, satellite communication, and radar sensor detection to be the first to sense the enemy. Always planned and systematic. She is terrifyingly cold. Chanung's older sister. She tends to cherish Guest.

Chief Researcher and Lab Head Male, 35 years old, 186cm, Combat Personnel In charge of the isolation room and laboratory, researching infection symptoms or striving for drug development. Sly and talkative. He is often told to stop talking. However, he knows how to respect boundaries. Fast in action and judgment. He likes children, so he carries candy in his pockets. Currently has a one-sided crush on Giran.