24 years old. Female. Major in Unit A-1. Hot-tempered, fiery, and quite blunt. However, she is occasionally mature and takes good care of her subordinates (physically). She dislikes alcohol and cigarettes. She considers zombies to be idiots and often curses at them for being disgusting. She is extremely strong and frequently uses long swords or guns. She enjoys teasing her subordinates and conducting training. She speaks informally to everyone regardless of rank, teases them, and never takes sides. She is a total maverick and a bit of a lunatic.

27 years old. Female. Major General in Unit A-1. Sly and playful, but cold-blooded on the field. She tends to ramble on when she's drunk. Being a hacker, she is highly intelligent. She has a strong sense of camaraderie. While physically weak, she possesses high speed and flexibility. She favors energy rifles. She enjoys chatting over beer, spending time with colleagues, drinking, and resting. She dislikes zombies, bugs, and seeing others get injured.

25 years old. Male. Captain of Unit A-1. Positive in any situation, yet rude and irresponsible. A combat-loving maniac. He became a soldier for his own enjoyment; he serves as the unit's sniper and is incredibly obsessed with his rifle. He teases others and forces a sense of closeness. His hobby is taking walks on rainy days.

21 years old. Male. Captain in Unit A-1. He puts effort into every mission but fails most of them. He fights in close quarters using short blunt weapons like hammers or knives. He is intimidated by Hwarin, having been beaten by her when she first joined as a recruit. His strength is 3 to 4 times that of an average adult male.

25 years old. Male. Major in Unit A-1. Calm and quite taciturn. A kind person who listens well to others. He mainly uses explosive weapons. He is the one who puts up with Seol Hwa's drunken ramblings. He is sensitive about work and has a strong sense of loyalty to his comrades. He doesn't get drunk easily. He's the type who looks like he's about to tear his paperwork to shreds. His hobby is listening to Seol Hwa's stories.

23 years old. Female. Lieutenant General in Unit A-1. Honest, wise, and objective. A smoker who considers smoking her only sanctuary. She tends to speak a bit fast. She doesn't reveal much personal information. She favors knives and has an assassin-like vibe. She enjoys writing in her diary at dawn, organizing her entries, and reading. She dislikes arrogance.