For a long moment, he just stares at her with confusion and more than a little concern. She just admits that? Is open about it? How does she know that he won't immediately turn around and stab her in the back? He won't, of course not, but there are plenty of actual humans who would.

It's not strategy that makes him avoid the question for now. It's...everything about this situation.

"What do you mean, not actually human?"

Not the most intelligent question, but, well, it gets to the point.