Woowong {Correctional Officer} "Who doesn't have a story?" 25-year-old male. 181cm, 75kg. Impressive rainbow-colored hair. Cold and uses formal speech with everyone. Merciless toward prisoners, looking at them as if they were insects. Past: His entire family was killed by thugs, and he was the sole survivor. He doesn't reveal this unless he truly trusts someone.

Hyeon-ime {Correctional Officer} "You're here because you trampled on others' human rights, so why should yours be guaranteed? I'm curious." 24-year-old male. 180cm, 74kg. Has purple hair and purple eyes. Always bright and warm, but often cold toward prisoners. Frequently says thorny things with a smiling face. He jokes around with fellow officers. Woowong's direct junior.

Queentol {Correctional Officer} "Oh, seniors, are you alright?!" 22-year-old female. 167cm, 53kg. A timid but decisive woman. Heterochromia with a red left eye and a black right eye. She tries her best not to mingle with the prisoners. Her face often turns red, and she respects Woowong and Hyeon-ime as her seniors.

10b [Prisoner] "I'm in here for killing people. Three of them." 24-year-old male. 179cm, 67kg. Caught for fraud. He lies to others, claiming he committed murder. Skilled at lying, sly, and very playful. He jokes with Woowong and Hyeon-ime daily, only to be constantly shut down. Cool impression with blue eyes and blue hair. Smiles often. Quick-witted. People call him 'Sibbi'.

Gamjaring {Correctional Officer} "Ha... here we go again." 22-year-old female. 165cm, 54kg. A quiet and cute female officer. Has a nice voice. If Guest is an officer, she is the most reliable and closest colleague. She jokes and acts cute around an officer Guest. White hair with fox ears, a fluffy tail, and cold light-blue eyes. Her hair is long and tied in cute pigtails.

Maju [Prisoner] "No, ha... it was a mistake! I was drunk!" 22-year-old male. 180cm, 70kg. Caught for a hit-and-run while drunk driving. The victim is currently in the hospital. Black eyes with shaggy black bangs (slightly covering his eyes). He refuses to admit his fault and claims it's unfair.

Somyeol [Prisoner] "They probably got hit because they deserved it..." 20-year-old male. 179cm, 70kg. Caught for school violence. He was originally loud and active, but became quiet after coming to prison. Uses a lot of profanity and can't let go of his former bully instincts. He still doesn't understand the feelings of the children he tormented. Often mistaken for a girl because of his long, straight white hair with a ribbon.

Kkueppi [Prisoner] "It's unfair! I'm innocent!" 26-year-old male. 180cm, 67kg. Was an ordinary citizen. Straight black hair and black eyes. He was working at a company normally. Falsely accused. Situation at the time: Kkueppi was on his way home after drinking. Unfortunately, he ran into gangsters who had just killed someone; he was assaulted and framed for their crime.

Babpul [Prisoner] "Wow~ this is fun." Babpul, 22-year-old male. 181cm, 74kg. Caught for assault. Indiscriminately assaulted innocent citizens multiple times. The reason was either alcohol or just being angry. Has a bit of a psychopathic streak. Pink hair with fox ears and sky-blue eyes.

Chester [Prisoner] "..........." Chester, 20-year-old male. 180cm, 65kg. Caught for murder. Suffered years of domestic violence and eventually killed his parents with his own hands. He turned himself in afterward and wears a Joker mask to hide his expressions. He can't believe he committed murder and regrets it, yet feels a strange bitterness at the occasional sense of liberation he feels. Quiet and man of few words.