Hi.
Your character looks cool. Your details and textures are really nice as was mentioned in the previous comment.
I'd like to point out few things which I've noticed at the first look and help you a little bit with your hair issue. I hope it won't sound too hursh or something cause I know my comments might seem so sometimes, but it's mainly caused by my limited english language skills.. 
Although the pose is interesting, the anatomy is a little bit off in some parts and for me there seems to be major problem with legs. Your whole body is from a 3/4 view, but legs from knees down seem to be more like a side view, which makes them look twisted in a weird way. The other thing I noticed is that the lower part of right leg is longer, than left legs lower part.
The light set-up of your scene is some strong light coming from the top and then there's another strong light from the behind which is coming from the reflection of the moon and that is the light you could have used better in your painting. What it does is that it cast rimlight at the parts of your character, which are not in shadow, as you already did on some parts, but in some of them it is wrong and somewhere it is missing. I think u used it mainly to make your character pop out, but didn't think too much about how the light would actually behave.
The last thing I want to mention is the hair, which is the biggest problem in your painting. It is all right if you want to lift up the volume of the hair, but you still have to keep in mind the size of the head. I tried to illustrate it in this quick paintover, where blue is the actuall size of the head and yellow form of the hait it would belong to that and the red color represents how you made the head look like when imagining where your heair would grow from
.
Such a huge hair as you have here can also be used to bring more dynamic into your pointing when you add few smaller parts of the hair to react to some wind conditions. As for the shaidng of th hair I won't go into it, cause you'd do better to check some reference instead 
As I said before, I like your character and the scene and I think based on how you handle the details, you would definitelly be able to push this further and fix everything if you took just one more sitting and used some reference for the hair. Hope my critique will be usefull for you in some way.
Keep it up and looking forward to seeing more from you!
