Here are some photo's so you can get a better idea if you don't no who they are.
First up is EXO - K. K consists of Suho: whose real name is Joonmyeon (the Leader), Kai whose real name is Jongin, D.O whose real name is Kyungsoo, Baekhyun, Chanyeol and Sehun (the Maknae). And now for some photo's/
From left -right Chanyeol, D.O., Kai, Sehun, Suho and Baekhyun
From left - right Baekhyun, Chanyeol, Kai, Suho, Sehun, and D.O.
From left - right Chanyeol, D.O., Sehun, Kai, Suho and Baekhyun
Now for the individual member profile. This is always the fun part. :)