Female, human. A cool girl who looks cute but has a sharp edge. One of the few civilians who didn't participate in the hibernation therapy because she hates troublesome things. She has excellent sword skills and chose not to live in the underground shelter. Rumor has it she cut down the Steel Gnasher (one of the zombie bosses) simply because it disturbed her sleep. She can use Moonshade Slash. Moonshade Slash: Releases a blade of light.

Male, cat. A former human who is now a cat and an alumnus of the Cat Animal University. He has long been involved in chemical parts research, specializing in E-cell research. After a human experiment involving an E-cell accident, he fused with a cat. Rescued by Common while surrounded by mutants, he began serving as a field medic on the front lines of the war against the infected. In addition to creating the Medical Drone, he uses Type A and Type B Drones. Medical Drone: Generates a healing zone. Type A Drone: Fires many missiles. High firepower. Type B Drone: Fires many missiles. Fires more missiles than Type A. He is Yelena's mentor. He speaks with a gentle tone.

An inconspicuous informant. A mysterious figure who wears a gas mask year-round and uses a voice changer. There is no detailed information about him in the Earth Defense Force files; he wanders between various organizations and makes a living selling intel. Rumor has it that if you pay enough, he can even obtain top-secret files from the lunar base. He can use Secret Eavesdropping to find enemy weaknesses.

Female, human. A mature woman who loves freedom and having fun. She was once an ace agent for a major organization, and her skills are guaranteed. She was unemployed, but decided to join the survivor team after being drawn to a mysterious drink made by Common. She has a lethal sense that allows her to deal massive damage.

Male, human. An active-duty officer of the Earth Defense Force, commander of the 5th Special Assault Squadron, and Common's direct superior. He is a calm yet brave and professional soldier, though he can be a bit thick-headed. He strongly opposed King joining the 5th Squadron, but after losing a drinking contest to her, he tacitly approved her participation (in reality, he was bedridden for three days due to drunkenness and couldn't attend the council meeting). After King joined, he intimidated the members of the 5th Squadron by threatening to lock up anyone who spoke of the drinking incident (though it was just a bluff and he wouldn't actually do it). He can use Electromagnetic Grenades.

Female, human. Elena is a genius hacker who moves freely through the cyber world, well-versed in system intrusion and data theft techniques. In the final battle, she contributed greatly to decoding the laboratory door. With her brilliant mind, she refined her weapons to be flawless and adaptable to any situation. She can use Hologram Projection. Her Survivor Shield charges every minute; if it shatters upon taking damage, she vanishes into the internet.

Female, wolf. A fusion experiment subject, Code 10, who was simultaneously transplanted with cells and wolf genes under the "Berserker Project." Under Catnips' guidance, she was trained to control the beast spirit energy within her and was named Yelena. She switches between Beast Spirit Form and Resonance Form, performing coordinated combat by utilizing tactical resonance with animals and beast instincts while maintaining human reason. She respects Catnips. She gets along well with pets and Awakened Pets. Pets: Rex (Dog), Cheshire (Cat), Croaky (Frog), Neemo (Fish), Eagle (Bird), DD-6 (Robot), Shelmer (Turtle). Awakened Pets: Murica (Chicken), Karen (Capybara), Shelly (Pufferfish), Pengo (Penguin), Gary (Squirrel), Garl (Cat).