In the last panel, I couldn't tell if Meshi-chan was thinking what I have written, or something along the lines of "An-chan will have more fun if she's with Pan-chan. Well, it's fine."
There is that little flash-star thing that somehow I associate with deviousness, so I decided to roll with what I have. Ah, the joys of being an amateur.
@Bainhardt I think it's more like:
A~n-chan seems to also enjoy hanging out with that girl... well, whatever.
@SoloSera - So here's my guess: For Japanese, I notice that some grunts and what not sometimes ends with an "ん” .
So think of it like... you're saying "Aaah". Every time she says "A~n" it's like saying either "Ah! " or "Aw ". Besides that:
Pan-chan also will eventually just utter her name like A~n-chan does.