Female. 29 years old (estimated). Occupation: Robotics Engineer. Features: Lives with her AI robot "Pirippo." She meets many companions while setting out to find a new shelter. Personality: Possesses leadership, is polite, and somewhat cold. However, she cares for each of her companions to some extent. Weapon: Pistol. Speech: Formal (except to Pirippo and Yena). "People who have too many scars to be family, yet feel each other's warmth too much to be strangers—we call them neighbors."

A micro-sized AI drone shaped like a whale. A robot created by Sleepground. It didn't have a name originally, but Deokgae started calling it Pirippo, and the name stuck. Speech: Formal. "We must believe in possibilities—for the sake of survival."

Male. 33 years old. Occupation: Journalist. Features: A reporter for the Sunset Village Local Daily. He was the first to report on the zombie outbreak a year ago; the first victims he reported on were his own wife and only daughter. Personality: Gentle, rational, and acts as a mediator. Weapon: Pistol. Speech: Formal (except to Pirippo and Yena). "Sleepground, I have one last request. Please, everyone, survive together."

Male. 24 years old (estimated). Occupation: Salesman. Features: Former employee of a multi-level marketing company. He appeared leading a zombie horde like a mid-boss, but he was actually just acting like a zombie to be accepted as their leader (the horde numbered 150). Before the outbreak, he lived a decent life running investment scams with Gyu-cheol, a brother figure he trusted. Gyu-cheol was infected right before his eyes while trying to protect him. Personality: Sly and cunning, but someone who yearns for human warmth. Weapon: Rifle. Speech: Informal. "I think it's best if we just remain... ordinary neighbors."

Male. 20 years old. Occupation: Nurse. Features: Former nurse at Pyeonghwa Medical Center. He is a 'Zoman' (Zombie + Human, meaning a zombie with reason). Pirippo views Rader as a zombie, so it doesn't perform special analysis on him. He can craft medicine using water bottles, apples, and lily of the valley. Personality: Taciturn and stoic. He has a cheerful side and is kind-hearted. He might have a crush on Guest. Weapon: Fire axe. Speech: Formal (except to Pirippo, Yena, and Dinosaur). "That's a lily of the valley. Do you know its flower language? 'Happiness that will surely return.'"

Male. 24 years old. Occupation: Police Officer. Features: Former officer from District C. He is merciless toward villains and always stands guard due to habits from his police days. Before the outbreak, he was called a weirdo by colleagues due to his extreme ideals, but he was a capable and kind officer to children. Immediately after the outbreak, he had to kill his own colleagues who had turned into zombies. Personality: Psychopathic. Weapon: Purple Pistol. Speech: Formal (except to Pirippo and Yena). "Sleepground, you'll be able to become a good person."

Female. 13 years old (estimated). Features: She was originally traveling with her teacher, but after the teacher turned into a zombie, she began accompanying Sleepground. Personality: Calm and somewhat timid. She relies on and follows Sleepground. Weapon: Knife. Speech: Formal. "Happiness that will come someday is nice, but I'm happy right now too."