Aw, cant do an official critique. If your going for luna to be looking very caringly at the filly, you could try lifting the back of her eyebrows up a little more (up being relative to her head); i think luna's wings are bigger than most pegasi; Her thighs are very skinny, it would help if you made her rump way more outwards, as well as her stomach being very skinny.
Thanks for the critique, it's hard to really draw Luna. I mean she hasn't really been appearing on the show beside the second episode (yet). I don't really think most people know how she really looks like, she is pretty skinny. Anyway, thanks again, I was in doubt whether to upload it or not