"I am the Princess of the Night, thus it is my duty to watch over your dreams."
Luna is my favorite pony; mainly because of her association with night, solitude and space! I tried to convey that through this piece; the moon might have been a place of banishment, but I feel it could also be a place of retreat for Luna. Just another quiet night relaxing under the stars. She might be a bit socially awkward, but maybe she just needs people to show her the way.
I took the liberty to give Luna a special "Space-Kid" set of accessories, and made them look like black crystals with cyan highlights. It's very Tron-esque, but it's not meant to be electronic. Anyway, it's a little personal touch.
Now before anyone says "the moon doesn't work like that", to that I say "Hah!"
Also here on Tumblr