This piece is amazing, first of all. The lines are cleanly and neatly drawn, and the shading and lighting are both done beautifully. I really don't have any suggestions for this piece of work, other than the pose seems kind of stiff, though I can see that you probably wanted her that way for a cute effect, and her right hand seems, I don't know, small or something--it just doesn't seem to fit with the rest of the picture. Other than that, i applaud you for her adorable expression, good anatomy, and, as I said before, awesome lighting and shading. Naruto's definitely thanking you!