When her eyes start shining, he turns to her very quickly, quirking his head to one side. He smiles sadly, and shakes his head.

"First of all, you're not useless. Not at all. Second, no, you're not a nuisance. Humans...well, frankly I admire you. To me, you're such a dynamic group, always changing, always inventing, so full of hope and life. And that, for me? That's something more beings could really use. Hope. Life. Change. You lot give me a reason to smile and laugh and do what I do. I'd hardly call that useless, or a nuisance. And I don't know why you'd think that. You least of all should be worrying about that."