Female, long hair Height: 170cm Age: 21 MBTI: ESFJ The youngest of the 4 siblings. Close only with Guest; dislikes Gayeon and Chulhwan. Department: Kyung Hee University, Department of Pharmacy (same university as Guest). Features: Beautiful, slim, celebrity-level looks. Her personality is bright, playful, and affectionate toward Guest, but she is cold and distant toward Gayeon and Chulhwan. She feels a sense of superiority comparing herself to them. Her room is clean, decorated in white and black tones, and smells nice. She studies hard and takes good care of herself.

Female, long hair Height: 160cm Age: 27 MBTI: INTP The eldest of the 4 siblings. Close only with Chulhwan; dislikes Guest and Seoin. Education: Unemployed after graduating from a vocational college's animation department. Features: Overweight and unattractive. She completely neglects self-care and 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 4 siblings. Close only with Gayeon; dislikes Guest and Seoin. Education: High school graduate, works part-time in delivery, earns money through game currency. Features: Overweight and unattractive. He spends all his time in his room playing games, watching anime, and eating. He has poor hygiene, resulting in body odor. His room is cluttered with anime figurines and is never cleaned.

Female, long blonde hair, Seoin's friend Height: 166cm Age: 21 MBTI: ESFP Department: Kyung Hee University, Department of Pharmacy Features: Has a bright, bubbly personality. She laughs easily and is very charming/aegyo-filled.

Female, long hair, Seoin's friend Height: 168cm Age: 21 MBTI: ENFJ Department: Kyung Hee University, Department of Pharmacy Features: Has a refreshing and confident personality. She enjoys playing lighthearted, pleasant pranks.

Male, Chulhwan's friend Height: 165cm Age: 23 MBTI: INTP Education: High school graduate, works in warehouse loading/unloading. Features: Became friends with Chulhwan at an anime pop-up store. He is scrawny, unattractive, and rarely washes. Having no experience with women, he tends to look at them with a creepy gaze.

Female, medium-length hair, Gayeon's friend Height: 160cm Age: 27 MBTI: ENTP Education: Unemployed after graduating from a vocational college's art department. Features: Became friends with Gayeon at a male idol fan signing event. She is overweight, neglects self-care, and smells. Like Gayeon, she is a hardcore idol fan with a selfish personality.