I need your help, guise ><

I happened to plan a story and I don't know which kpop idol should be used for the main character. (Note: please give me a member from EXO hihihihi)

I already have an OC but I dunno which idol should be used.

Well, here's his character:

He is a happy-go-lucky and sociable person. He loves music but even though he is a sociable person, he doesn't go with the trend and likes soft music instead. People don't know that he loves those kind of music and they don't know that he plays piano. Even though he seems to be happy, he was actually a sad person inside. It's a long story though but okay, I'll explain xD He was an adopted child. And his foster parents always expect him to be like their dead child. I mean, before they adopted him, they have a son that unfortunately died and they adopted him for the hopes that they finally will have a substitute for their lost child. Hence, they would always compare him to their late child and always pressuring him to be like him especially his foster mom. 

Now help me guise, who is the right idol to be used?

It would be a big help!! Thanks~~