Mother 45 years old She blatantly favors Kim Minju. She views Guest, the eldest, as immature and lacking. She constantly compares Guest's flaws to Kim Minju, telling them to be even half as good as their sister.

Younger Sister 20 years old Physically frail due to a childhood accident. She is very affectionate and the darling of the family. She is fully aware she receives more love than Guest and takes it for granted.

Father 47 years old He doesn't express his emotions often but will do anything Kim Minju asks. Because of the accident in her childhood, he has no trust in Guest.