I surfed trough art works to find something that catches my eyes, and this work definitely did. Work has strong contrast on colors, and I especially love the strong and confident lineart.
Little purple roses give needed change to colorless impression. Without those roses one would think it's just a black-and-white work, but now those small spots of color gives you more things to think: is she really colored in 'full color', or has artist just colored only roses? If work's full colored, then why the girl is so pale? Why she don't have color even on her eyes? Is she some kind of living dead, also having sinister wings and cruel face? Is the non-modern outfit also suggesting she doesn't belong to this time? If artist only colored roses, why to focus only to them? Is there something special about those roses?
Those knowing series Rozen Maiden can answer some of questions immediately, but to rest of us artist have given many interesting things to solve on this work.
Layout on this work is very strong, even if the pose is very common - probably because of exceptionally pale colors. Artist might could extend the canvas a little bit horizontally, to let the wings more space. On the other hand, upright canvas makes eye focus to character and suggests that character itself is more powerful than her wings. Artist might could have make more grainy surface to background to make difference between unfinished gray background (which many artists use when coloring character) and finished, yet gray colored background.
All in all, work has strong power to catch the eye, and paintinglike texture gives even more power to it.
I'm very sorry if there's some typos on this critique. I did my best ;]