S.Coups has one older brother
Jeonghan has one younger sister
Joshua is an only child
Jun has one younger brother
Hoshi's older sister, one person
Wonwoo has one younger brother
Wooji is an only child
The8 is an only child
Mingyu has one younger sister
Dokyeom has one older sister
Seungwan's two older sisters
Vernon has one younger sister
Dino has one younger brother