This entire turn this conversation has taken is so far outside the realm of what Fiyero is used to, especially for someone he just met, that he has no idea how to parse it, let alone respond to it.

It's not about other people's empathy - then again, maybe a little bit. Certainly, Elphaba was the only one who was really able to draw any kind of vulnerability out of him, because of her empathy and her own vulnerability. A lot of people neither look that close nor have all that much going on to begin with. Kitty... is definitely doing both.

"You're a really strange guy, you know that?" he says finally, after a long silence. His eyes are slightly narrowed, like he's trying to figure Kitty out -- while trying to keep as neutral expression as he can, only partially succeeding.

He has no idea how to address any of the things Kitty just said - so he simply won't.