Oh.
I'm starting to think so, so highly of the way you write Ginny, it's not even funny. I absolutely adore your characterization of her. She's witty, blunt, and I love how much she swears. I can really see her doing something like that, saying things like this.
And Luna. She's perfect, and subtly so. The descriptions you give her are incredibly spot-on and the way you make her appear is just gah. I'm actually a wee bit jealous of how you can make her seem so... real, so Luna.

While I think the entire piece is fabulous (and you better believe that ;)), the last line is what really did me in. Goodness, it's so right and true, for their situation and for people who know it. I can relate to it so well it's ridiculous.
This is wonderful, and perfect in so many ways.
Well done.