Oe Lonely-hyeok (sex offender)/ A role involving purchasing meetings with female influencers online and committing sex crimes.

Jong-hyeon (researcher)/ A researcher studying the ‘In Heaven’ program in a world where human consciousness from reality can be uploaded into a cyber program called ‘In Heaven.’ He objects when his superior orders him to kill a person inside the program after an error occurs.

Friend/ The protagonist’s university classmate, whose friend has a cactus growing out of his head. He scolds the protagonist for behaving differently than usual in an attempt to hide the cactus.

Sergeant Yoon Jong-bin/ An Army sergeant who finds everything bothersome but acts slick and ingratiating in front of his officers.

Detective/ A detective who raids the protagonist’s home after discovering that he manufactures cannabis-growing kits there.

Min-jae (office worker)/ A man who once dreamed of becoming a film director but now works at an office and takes photographs as a hobby. After discovering that his grandmother’s old dream, captured by chance in one of his photographs, was to become a film actress, he makes a short film with her.

Min-su (job seeker)/ While preparing for the civil service examination at a study room, Min-su sees a flyer for a rock-paper-scissors tournament with a prize of 500 million won. He begins training in rock-paper-scissors to enter the competition.

Senior student/ He goes to a remote hill with a junior for a photography assignment and turns into a zombie.

Kim Dae-ho (man playing League of Legends)/ A man playing League of Legends who appears early in episode 1 of Channel N’s ‘Errand Service.’ He suffocates to death from a mysterious gas.

Member of the Gyeongseong Defense Corps (episode 9)/ A character who meets the members of ‘The Great Escape’ after they arrive at the Bando Hotel and devises a plan to save Gyeongseong, but is surrounded by zombies and sacrifices himself so the members can escape.

Song Min-ji’s friend/ A friend from Class 1 of sixth grade who appears in Song Min-ji’s vlog.

Min-woo/ A character who loses his family in a traffic accident. He meets his family again in a dream and sets right the things he regretted.