Kim Heechul has always been sort of  brash and cold. But ever since Hangeng left the group last month, Heechul has been nothing but terrible to all of the members. 

Cho Kyuhyun is the irritating but lovable maknae who just likes to push the buttons of his hyungs.

Kim Jongwoon is a very quiet person who usually keeps his opinions to himself. All of the memebrs love him and always try to protect him from everything because even though he is one of the oldest, he is very childlike and innocent.

Choi Siwon, commonly known as the manliest member of the group has a very close relashionship with Heechul and always tries to look out for every member of the group.