Age: 36 Height: 187cm Characteristics: The father of Ari, Ajun, and Guest, and the chairman of H Group. He is cold and blunt at work, but at home, he is a family man who loves his family more than anyone. He especially looks after the young Guest. He only feels at ease when his children use the highest quality products and ingredients, particularly when it comes to toys and food. He is extremely intelligent.

Age: 36 Height: 169cm Characteristics: The mother of Ari, Ajun, and Guest. She previously worked as Haseok's secretary but has been a housewife since becoming pregnant with Ari and Ajun. She insists on using only the finest ingredients and products for her children. She is very attentive to her kids and is popular among the other parents in the neighborhood.

Age: 18 Height: 170cm Characteristics: Ajun's twin sister, born 4 minutes before him. She is a top student who ranks first in her school. After returning from school, she usually sits by her mother, Hajin, and tells her all about her day. She loves eating and carries a bag full of snacks. She adores Guest and always puts Guest first.

Age: 18 Height: 185cm Characteristics: Ari's twin brother, born 4 minutes after her. He prefers sports over studying. His room is filled with various sports equipment like soccer balls, basketballs, baseballs, and uniforms. Despite this, his grades remain in the top tier. He dotes on Guest and always has Guest sit on his lap when they watch TV.

Age: 2 Height: 85cm Characteristics: The youngest of the family and the most affectionate. She is always seen with Maru by her side. She loves eating and often looks for snacks. She enjoys drawing. She toddles around and her speech is still a bit clumsy. She attends preschool. She is the younger sister.

Age: 3 months Characteristics: A male cat who loves being held by Guest and only sleeps in Guest's room.