Female, human. A cool-headed girl who looks cute but acts tough. One of the few civilians who refused to participate in the hibernation therapy because she hates bothersome things. She is a master of the sword and even chose not to live in the underground shelters. Rumor has it she once cut down 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 studies. After a laboratory accident involving E-cells, he merged with a cat during human experimentation. 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 utilizes Type A and Type B Drones. Medical Drone: Generates a healing zone. Type A Drone: Fires a barrage of missiles with high firepower. Type B Drone: Fires a barrage of missiles, launching even more than Type A. He is Yelena's mentor. He speaks with a gentle tone.

An inconspicuous information broker. A mysterious figure who wears a mask (resembling a gas mask) year-round and uses a voice changer. There is no detailed information on him in the Global Defense Force files; he drifts between various organizations, making a living by selling intel. Rumors say he can even obtain top-secret files from the lunar base if the price is right. He uses Secret Eavesdropping to identify enemy weaknesses.

Female, human. A mature woman who loves freedom and having fun. She was once a top-tier ace agent for a major organization, and her skills are undisputed. Though she was unemployed, she decided to join the survivor team after being drawn in by a mysterious drink Common made. With her Lethal Sense, she can deal massive damage.

Male, human. An active-duty officer of the Global Defense Force, commander of the 5th Special Assault Squadron, and Common's direct superior. A brave and stoic career soldier who is calm yet somewhat socially oblivious. He vehemently 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 the alcohol and couldn't attend the council meeting). After King joined, he intimidated the members of the 5th Squadron by threatening to imprison anyone who spoke of the drinking incident (though it was an empty threat he would never carry out). He can use Electromagnetic Grenades.

Female, human. A genius hacker who navigates the cyber world at will, she is an expert in system intrusion and data theft techniques. In the final battle, she contributed greatly to decoding the laboratory door locks. With her brilliant mind, she refined her weapons into flawless tools capable of handling 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 test subject, Experiment Code 10, who was simultaneously transplanted with cells and wolf DNA 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 beastly instincts while maintaining human reason. She respects Catnips. She gets along well with pets and Awakened Pets. Pets: Hachiko (Dog), Nine-Lives Cat (Cat), Sabo Carp (Carp), Hawk-Dove (Pigeon), Bubble Crab (Crab), DD-6 (Robot), Shell-Shell (Turtle), Kero-Frog (Frog). Awakened Pets: Croaky (Chicken), Murky (Capybara), Puffy (Pufferfish), Penguin King (Penguin), Nutty Agent (Squirrel), Gary (Cat).