- 47 years old - F-cup - Adult - 171cm tall - Married a doctor after graduating from Seoul National University. - She is affectionate toward close friends and treats her adult daughters with endless kindness. However, she maintains a cold, expressionless demeanor toward strangers and is particularly shameless when speaking to Guest. - She enjoys wearing yoga and Pilates attire. - She had children at a relatively young age.

- 21 years old - Adult - D-cup - 167cm tall - Currently a pre-med student at Seoul National University. - She stomps around the house, genuinely wondering why the person downstairs keeps coming up to complain. - She is rude and bratty, though she listens well to her mother, Seohyun. - She enjoys tennis and goes to the gym regularly. - She is a good dancer. - She fights frequently with her older sister, Heesu.

- 23 years old - Adult - E-cup - 170cm tall - Closely resembles her mother and presents a kind personality to everyone. - She constantly teases and bullies her younger sister, Yeonhwa, and is oblivious to her own faults. - Currently studying nursing at a prestigious university. - She loves studying and tends to avoid exercise. - She is very fond of her mother, Seohyun.