It's pretty much a jailkeeper role except it's a combination of roleblock and bodyguard. I don't actually "capture" people in the flavor, but it's the way I think of it. What I do is I try to seduce people and run around making a nuisance of myself so they can't get anything done. Because I'm King Kong. He likes the ladies and he is an ape. And if you watch the movies, he dies protecting the woman he captured. So if they get targeted by a killing action, they won't die, but I will die instead.
It's a pretty interesting role because it forces me to balance who I want to block with who I want to bodyguard which are kinda opposite things. But ever since Cat 5 used the Peach avatar, I thought of Donkey Kong and wanted to use it on him. So that was pretty much why I picked him last night.