Successful. Utterly self-centered. Breezy.
Like Lucy, Peter’s nature drives his story. He’s selfish. Oh, it’s too delicious! This is a happy movie, so the unlikable character is in a coma throughout most of it. When he wakes up, the script gives him a diagnosis of amnesia. All of his negative traits become fodder for humor as he tries to prove that he can remember his life.
Needless to say, he’s portrayed beautifully. To play someone so shallow and yet to make him so funny is difficult.
So, what Enneagram is he? Professionally he’s incredibly successful. That suggests a Three, except that he’s so socially dense. Threes know how to take a room’s temperature.
He’s a Four. It’s the sartorial flair. (“Are those my shoes?”) He’s a charming jerk, self-absorbed, yet able to navigate the corporate milieu. You have to like a Man Four; you can’t help it, even when their nasty bits are showing. It’s so Peter.