What a dynamic picture!! I absolutely love the pose you've chosen here; it's so unique, and it really brings something amazing to the overall impact of the piece. The character's design is nice, too, with a good balance of vibrant and neutral colors.
I think there are two areas of this piece that could use improvement: anatomy and shading. First of all, kudos for tackling such a difficult pose. I'm quite certain I would not be able to come up with something near this good without consulting a bajillion references first. What I've noticed is that things seem a bit too elongated: her neck, for instance, is a bit too long for a human neck, even bending like that; also, the lower parts of her legs are a bit long for the upper part. If you look at anatomical references, you'll notice that the thighs and calves are roughly the same length (excluding the foot). Her head is also turned a fraction too close toward us--that's a minor one, though.
For shading, I would recommend making your shadows more dramatic. For a night scene, I would imagine more light bouncing off the fabric of her clothes and all that, and maybe some moonbeam highlights on her wings. Don't be afraid to play around with radical colors (like purples and blues) for your shadows--doing that will help make this piece even more dynamic!!
Aw thanks. Yeah I never tried this pose before and I used no references haha. You're only the second person that pointed out the neck was too long. If only someone pointed it out before I started coloring haha. And you should've seen the legs before the final lining they were so freaking off haha. Thanks for you advice though and I will keep it in mind for the future