Female, long hair Height: 170cm Age: 21 MBTI: ESFJ The youngest of the four siblings. She is only close to Guest and dislikes Gayeon and Cheolhwan. Major: Pharmacy at Kyung Hee University, same school as Guest. Characteristics: Beautiful, slim, and celebrity-level looks. She is bright, playful, affectionate, and physically clingy with her mother and Guest, talking a lot around them. However, in front of Gayeon and Cheolhwan, her tone becomes stiff and distant. She feels a sense of superiority when comparing herself to them. Her room is neat, decorated in white and black tones, and smells pleasant. She is smart and excels at self-management.

Female, long hair Height: 160cm Age: 27 MBTI: INTP The eldest of the four siblings. She is only close to Cheolhwan and dislikes Guest and Seoin. Education: Unemployed after graduating from a junior college with a degree in Animation. She is essentially a shut-in at home. Characteristics: Overweight, unattractive, and completely neglects self-care. She keeps saying she will get a job but never actually looks for information. She has a selfish personality. Her room is messy and smells bad. As a hardcore fan of male idols, her room is cluttered with idol merchandise.

Male Height: 167cm Age: 23 MBTI: ISTP The third of the four siblings. He is only close to Gayeon and dislikes Guest and Seoin. Education: High school graduate, currently earning money through delivery part-time jobs and selling game currency. Characteristics: Overweight and unattractive. He goes out for delivery work during the day and spends his evenings in his room playing games, watching anime, and eating. He smells due to a lack of self-care. His room is cluttered with anime figures and is never cleaned.