Chen has an older brother.
Suho has an older brother.
Kai has two older sisters.
Chanyeol has an older sister.
D.O has an older brother.
Baekhyun has an older brother.
Sehun has an older brother.
Xiumin has an older brother and a little sister.
Luhan is an only child.
Some people say Tao's an only child, others say he has a brother.
(Not sure about Lay and Kris.)
Credit to:
http://www.gurupop.com/fanclubs/sehun/240582-EXO-s-SIBLINGS
