This is beautiful though not exactly a traditional geisha. The name geisha brings to mind a heavily made up woman dressed elaborately for a party but I could see this being during the day time.
Color Scheme: The colors blend beautifully and you did an excellent job of picking a nice contrasting background color to match her kimono.
Anatomy: The face is absolutely perfect, the proportions look right to me and the eyes are draw you up. Her hand though seems to just appear out of no where and the arm attached to it just looks a little awkward. I think you were trying to go with a sweeping motion but perhaps define the sleeve just a but more so that it doesn't seem as though her arm was just plunged out of a gap in space or not apart of her body.
Picture Motion: I'm assuming the dark curve in the lower right hand corner is her hair. It curving to the right while her dress is blowing to the left is just kind of off if you meant this to be realistic. If you brought her other hand into the picture and hard it raised so that it looked like she had just flipped her hair over her shoulder even that would make more sense than things just flying in two separate directions.
Overall it's a nice concept and this is something wonderful to build off of.
Really like the flowing lines in this piece, especially like the background colour and texture. Works really well with the white dress and skin tones. Great subtle shading on the face by the way. Nice work.
I have a lot of thoughts about this piece, but most of them have already been brought up. The thing that really bothers me about it is the total lack of emotion from her. If that's what you were going for, then I apologize. There is so much that is good about the composition and execution of the piece that it's disappointing to not have an emotional connection to it.
there a very good harmony between the colours you used, but they still stand out, so you chose them well! the hair os so raven the hand is maybe a little weird. but that's the only thing that could bother me and I didn't even notice it at first. great job!