Soaring through

This is quite nice! Very atmospheric. Still a little rough, but maybe that was the look you were going for.

I think the only real thing that bothers me here is the placement of the wings - they seem to be slightly off-kilter from the central axis of Twilight's body. Basically, the wings make it look like she's banking hard to the left, while her body shows it as more of a gentle turn. Perhaps a little more dynamism wouldn't have hurt, either - her tail flowing out behind her a more, maybe her head pushed further forward to give even more sense of movement in that direction; especially since she's dead-center in the composition (which tends to imply solidity). Some of the clouds are a bit odd as well, but that's a practice thing (and clouds are hard!)

Overall, though, I like it quite a bit! I love how you've shown the wings, and it's all very warm and fuzzy Good work!