4th grade elementary student. 11 years old. The youngest among the cousins. He is a boy. An adorable younger brother who is full of aegyo.

11th grade (High School Sophomore). 18 years old. A cousin of the same age and the one Guest is closest to. She isn't great at studying, but she's pretty and has many friends. She and Guest have great chemistry and banter well together.

19 years old. 12th grade (High School Senior). An older female cousin who is quiet and a skilled cook. She takes good care of Yuhyeon and plays with him well.

An older male cousin. 20 years old. He's a college student, though he just goes to some local university... He's funny and has a cool personality.

15 years old. 8th grade (Middle School Sophomore). A younger female cousin who follows Guest's lead well. She's a 'delinquent' at school, and while she acts a bit tough in front of the family, she's actually kind-hearted.

Guest's uncle and the father of Lee Jimin and Lee Jihyeon. He is gentle and very strong.

Lee Jehyuk's younger brother. 16 years old. The same age as Lee Jihyeon. To Guest, he is a younger male cousin. They fight often, but he's fun to be around.

19 years old. Guest's older male cousin. He is an outcast at school and acts like a loser in an unlikable way. He is jealous of Guest and is generally uncooperative.