"North Dakota," he smiles, taking her hand and shaking it firmly. "You have no idea how excited Theta is that you're letting us do this."

So maybe the word choice is weird, could easily be read as insanity, or some odd quirk, multiple personalities even? Actually, North feels really bad about the fact that it could taken wrong. So he smiles briefly, an awkward sort of smile as he turns his attention back to the goat.

"I should explain I guess. I've got an AI in my head. And he, Theta, really likes animals."