So Prection: Whose closet abs do I belong to?

Hints:

My group is one half of a bigger group.

I don’t often flash my abs unlike the leader of our brother group.

During my trainee days, our entertainment company sent us to a boot camp which I passed.

I’m the tallest among my members.

I have a fear of creepy crawlies.

Who am I?

(Answers in an upcoming post!)