Michael Guerin and Paige Matthews
Michael had some idea o what a witch was, at least from movies and pop culture. Sure, she was prettier than his mental vision, but that could change easy enough. He probably didn't look like anyone's description of an alien, either.
But a whitelighter? He didn't have a clue.
"Okay, witch I get. But what's a whitelighter?" He didn't even have any clever guesses for that - he'd never heard of anything like it.