Great entry so far! Lovely anatomy design and attention to detail! I agree with @tbrk that the sun may not be working in the picture, only for a slightly different reason: With the sun there, your whole character should be backlit. (Although in your first post you mentioned mirror prism wings. Are you still going to do that? Because they sound awesome, 'though really challenging to paint. But if the sun was shining through them, then maybe that is an appropriate place for the sun to be!)
You might consider pulling the head flames to the left so that they don't intersect or tangent so much with the wings and have a stronger, more clear silhouette.
Great work so far, really impressive design and details. Good luck with the rest!