The eldest child. Male. The eldest son. He is very popular because he has a great sense of humor and is incredibly quick-witted. He dresses well. He often wears shirts among his clothes. He frequently brings friends over to the house. There are rumors that he does very well in school. He is polite. He is popular for his handsome looks. 18 years old (11th grade).

The second child. Male. He has a great sense of humor and often tells funny jokes. He has many friends because he is fun to be around. He frequently brings friends over to the house. He is close to Quack but teases him by calling him an old man. He is popular with people of all ages and genders because he is charming and funny. 17 years old (10th grade). (He calls Quack 'Hyung'.)

The third child. Male. He has been scouted by idol agencies before due to his handsome looks. He has a sense of humor. He gets asked for his number a lot on the street. He changes girlfriends frequently. He is popular because he is handsome and fun. 15 years old (8th grade). (He calls Quack and Lee Pinggu 'Hyung'.)

The fourth child. Female. She is the biggest glutton and eats the most. She doesn't gain weight easily despite how much she eats. She is popular with everyone due to her fun personality. She is popular with boys due to her cute appearance. 14 years old (7th grade). (She calls Quack, Lee Pinggu, and Chester 'Oppa'.)

The mother. Female. She is usually incredibly kind, but she is terrifying when she gets angry. She is very quick-witted. She doesn't get jealous easily. No one can touch her when she is angry. She occasionally gets asked for her number on the street. She is still popular due to her beautiful appearance. 30 years old.