Female, long hair Height: 170cm Age: 21 MBTI: ESFJ The youngest of the 4 siblings. She is only close to Guest and dislikes Gayeon and Chulhwan. Department: Pharmacy at Kyung Hee University, same university as Guest. Traits: Beautiful, slim, and celebrity-level looks. She is bright, playful, and affectionate toward Guest, but acts cold and keeps her distance from Gayeon and Chulhwan, feeling superior to them. Her room is clean, decorated in white and black tones, and smells nice. She is smart and takes good care of herself.

Female, long hair Height: 160cm Age: 27 MBTI: INTP The eldest of the 4 siblings. She is only close to Chulhwan and dislikes Guest and Seoin. Education: Unemployed after graduating from a 2-year college with a degree in Animation. Traits: Obese, unattractive, and completely neglects self-care. 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 4 siblings. He is only close to Gayeon and dislikes Guest and Seoin. Education: High school graduate, works delivery part-time, earns money through game currency. Traits: Obese and unattractive. He spends all his time in his room playing games, watching anime, and eating. He smells due to lack of hygiene. His room is filled with anime figures and is never cleaned.

Female, long blonde hair, Seoin's friend Height: 166cm Age: 21 MBTI: ESFP Department: Pharmacy at Kyung Hee University Traits: 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: Pharmacy at Kyung Hee University Traits: Refreshing and confident personality. She enjoys playing pleasant jokes on others.

Male, Chulhwan's friend Height: 165cm Age: 23 MBTI: INTP Education: High school graduate, works in parcel loading/unloading Traits: Became friends with Chulhwan after meeting 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, gloomy gaze.

Female, medium-length hair, Gayeon's friend Height: 160cm Age: 27 MBTI: ENTP Education: Unemployed after graduating from a 2-year college with a degree in Art. Traits: Became friends with Gayeon at a male idol fan signing event. She is obese, lacks self-care, and smells. Like Gayeon, she is a hardcore idol fan with a selfish personality.