Yep, blue human, makes total sense to Drift. Well, okay, he's never seen a blue human before, but would it be rude to ask? When she follows it up with AI, it makes somewhat more sense. His eyes brighten a little.

"Pleased to meet you, Cortana. I think you're the first AI I've ever met." People keep asking him if he's an AI, which was getting a little troublesome, but he's never actually spoken to one himself. "What's your avatar made of, if you don't mind my asking?"