Morgana and Aithusa

So one of my New Year's resolutions was to improve my general drawing skill, meaning branch out from equines! I'm starting with the most challenging obstacle--people. I took some requests from friends a few months ago, and after much dawdling, here's my first go! The character's are Morgana (the human) and Aithusa (the dragon) from BBC's Merlin. Morgana was and always will be my favorite character. No spoilers though, I haven't finished the series! Teehees.
Mature, supportive critique is always welcome! My aim in doing these drawings is to improve, so I could always use some kind, gentle tips.

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Image by ~HaliteAnn
Characters from BBC's "Merlin"
Made in Photoshop CS5