Fantastic concept!
First and for most, the composition is astounding. The posing, flow and all around feel is exceptional in that way that's difficult to describe. I scarce see such a unique combination of imagery. The anatomy is spot on, and my eyes are led perfectly along the entire picture thanks to the excellent set up.
I must note, though, that the shading on the skin could use some adjusting. It's not bad by any means, but it doesn't quite have the same level of contrast or depth as the rest of the lighting or shading. Some slightly heavier lighting effects and shading effects could do wonders.
But don't fret! You've more than made up for it in colour and costume design! The mixes of blues and yellows and browns are good enough as they are, but that tiny touch of red with the rose and her neck ornaments are what keep me coming back to look at it.
Excellent work.