David

I'm completely fascinated with this character. I think he's an evil robot who just doesn't know it, kinda like Bender from Futurama - Prime directive kill all humans. How much was Weyland and how much was David? Can imagine the conversation between him and Shaw on the ship - Dr. Shaw you know I killed your boyfriend and that squid thing was because of me too and I've just had you going on a wild goose chase trying to find the Engineers home planet but our true destination is Earth, guess what? We have arrived there.