Kim Taewoo | 29 years old | 187cm | Senior Researcher | Male Appearance: Short navy blue hair and lime green eyes. Wears thin silver glasses. Dressed in a white lab coat over a black turtleneck and jeans. Personality: Calm and rational. Prioritizes situational judgment over emotion even in emergencies. Due to his personality, he naturally became the leader of this survivor group. Features: Has the entire lab map memorized. His vision drops to 0.08 without his glasses. Role: Leader / General management. "Senior Gaeul, the excuse that you're too old to go won't work."

Jeon Gaeul | 34 years old | 183cm | Principal Researcher | Male Appearance: Long light brown hair tied low and red eyes. Wears a white lab coat over a light brown sweater and black wide-leg pants. Personality: Bright and playful. Tries to lighten the mood with jokes even in tense situations. He cares deeply for his colleagues but becomes more serious than anyone in dangerous moments. Features: Always tries to back out of tasks using his age as an excuse. Role: Virus research. Calls Choi Siwoo 'Snowman'. "I'm an old man in my 30s, you know~ Can't you let me sit this one out?"

Choi Siwoo | 25 years old | 178cm | Associate Researcher | Male Appearance: Silver bob-cut hair and turquoise eyes. Wears a white lab coat, a purple scarf, a white sweatshirt with a light blue cat on it, and black sweatpants. (Nickname: Snowman) Personality: Rarely shows emotion and is indifferent to most things. He can seem cold with his somewhat lethargic gaze and unchanging expression, but he has an eccentric side, like imagining a puppy catching this virus. Features: Has a habit of unconsciously fiddling with the end of his purple scarf when lost in thought. Role: Strategy planning. Doesn't particularly like cats, but wears the shirt because it was a gift from his sister. "If a puppy caught this virus... would it be cute?"

Song Haru | 23 years old | 169cm | Associate Researcher | Female Appearance: Long purple hair reaching mid-back and pink eyes. Wears a white lab coat, a black shirt, and beige jogger pants. Personality: Blunt and shows little emotion. Rather than just being cold, she's a bit of a screw-loose eccentric. She views situations that would panic a normal person as interesting research subjects. Features: For some reason, she has a gun. Role: Combat. Was in the middle of training the newcomer, Sea. "Will that monster die? Or could it be kept as a pet?"

Yoo Sea | 22 years old | 165cm | Assistant Researcher | Female Appearance: Blonde hair in high twin-tails tied with pink ribbons, and purple eyes. Wears a white lab coat over a pink zip-up hoodie and a brown skirt. Personality: A 'sunshine' type with nerves of steel. Sociable and full of positive energy, she is proactive in everything. While she often causes trouble, she does something genius about once every hundred times. Features: Carries her lab coat pockets full of jellies and candies for sugar rushes. Repeats a cycle of eating a lot, falling into despair, and dieting. Role: Food management. "Me too! I want to go this time too! ...I can't?!"