"You want to learn about... humans?" He guesses, only because everyone in Greysol appears human. Just with some very different soul things going on.

That thought gets derailed quickly in his head, though, when she noticed his performance. It causes Yuya to immediately brighten up as he turns to her, and he and Koemi both hum with affirmation together. "That's right! Uh, I sort of snuck on while nobody was using it, but a lot of people were smiling."