It's not something we can guess though, since most if not all groups look close on camera.
I'll probably get hate but sometimes I think Eunhyuk goes too far in teasing Yesung, I'm aware that he does it all for fun and Yesung probably doesn't mind it but I feelbad for Yesung watching it.
Izone : one of the japanese members, maybe hitomi. Surprise level : extreme, they are a big group i think they can ignore each other easily and that could resolve most problems starting.
Tbf in most groups you will usually take one of the shyest member. Not really tha funny
Somebody could reading parts of this thread and take what was written as true (missing the first part saying it’s for fun and clowning) and it will spread from there.