[Nona... is trying not to stare. Although, she's not sure why she's trying not to because Kanon clearly wants to be looked at. And she's also really, really pretty, like Crown is, and in a way that Nona isn't (Nona likes how she looks more though).

Then she asks the question and Nona is immediately in compliment mode.]

You're really nice looking and pretty and you're amazing at lying!

[C...compliment mode...]

I'm not good at lying at all though, I keep getting in trouble for it. Everyone always says "Nona, you should lie more." But you probably don't have that problem.

[She isn't being sarcastic in the slightest. And true to her word, there's no ambiguity over how earnestly her words are meant.]