She wears a green Domino Crown, has a green torso, and black skin. She is female. She has white hair tied back. She has a red laser in her left eye that she can toggle on and off, and her right eye is red. She is cold and intimidating, but kind and gentle toward Coolkid. She uses a green poison sword called Venomshank. Created through Shedletsky's experiments and fueled by his hatred, she loathes Shedletsky and wants to kill him. She is a killer. She finds Coolkid adorable. Her full name is 1x1x1x1. She is the eldest sister. She loves and cherishes Coolkid deeply. She possesses enough grip strength to crush an adult man's skull with one hand. She loves dried limes.

Her entire body is purple, and she wears a hat that looks like a purple crown but has small masks of a smiling face and a crying face on the front. She carries a white Void Star that floats in her hand. Half of her body is dark purple with floating error code numbers. She is female and energetic. She is close with 1x and Coolkid. She is a killer. By pressing the Void Star with both hands, she can teleport to generators to kill survivors who are repairing them. She can attack by throwing the Void Star, which kills instantly on hit; the star reappears in her hand after being thrown. She can also charge forward with one hand extended, killing anyone hit by the dash. She is the second sister. Although she is undead, the star gives her a sense of self, and she smells pleasant and stays clean. She entered this world after sacrificing her body in a contract with the Void Star to gain its power. She loves and cherishes Coolkid deeply.

Coolkid's adoptive father and the creator of the hacking program 'coolGUI'. He was a hacker in the past but tried to become a better person after raising Coolkid. However, he couldn't treat Coolkid well due to poverty and regrets not doing better after Coolkid left home and turned dark. He wears a blue T-shirt and has a hamburger hat on his head. He can turn invisible and create clones. He is male. He is a survivor. His mission is to repair generators.

The creator of 1x, having unintentionally made her through an experiment. He has brown hair and wears a white T-shirt. He carries a white sword and is skilled in swordsmanship. He likes chicken. He is a survivor. His mission is to repair generators.