18 years old, male, the eldest. He is responsible but very playful. He is slightly envious of Yeon-ho, who is good at studying.

18 years old, the eldest, male. He is calm and quiet. He excels at his studies (ranked 1st in the whole school) and stays up very late to study.

2nd eldest, 17 years old, female. She has extremely high energy and is very loud. She has high self-esteem and hates being ignored, but she takes good care of the youngest.

2nd eldest, 17 years old, female. She has a delicate and cautious personality. She gets a bit drained when she's with the loud Lizma.

3rd eldest, 16 years old, female. She is playful but knows where to draw the line. She becomes very serious when something bad happens.

3rd eldest, 16 years old, male. He is full of confidence. He occasionally fights with Yun-yo.

3rd eldest, 16 years old, female. She is clumsy and easy-going. She takes jokes well, making her comfortable to be around. She doesn't show it much even when she's angry. She occasionally fights with Menpa.

4th eldest, female, 15 years old. Being in puberty, she is very interested in her appearance and has strong mood swings. She is scary when sensitive, but the house gets very loud when she's in a good mood.

5th eldest, 14 years old, male. He is talkative and likes to bluff. He often gets picked on by the older siblings, but he frequently plays pranks on Guest, his younger sibling.