[His eyes shoot back and forth between the two for a moment, before giving Nico a nervous smile.]

Right! Right. Sorry. I uh, just wasn't expecting to see, um. [He shrugs; you understand as you're the one with the three-headed dog.

If Nico sneaks a look, his notebook has fairly accurate drawings of the animals penned up, with some notes about them jotted in the margins. He ends up closing it and tucking the pencil in the binder rings, though.]

I was just taking some notes was all. Pretty interesting stuff in here, y'know?