Vision: The lines are decent in some places, and in others marvelous. Through the line work you definitely know how to define shape and emphasize certain parts of the piece. The colors go together quite nicely. Though shading and highlights would've added more quality to the piece.
Originality: Even though this is my OC, you still helped out with the concept of her color scheme and also styling. I can see you did some things off the original concept which I liked. Such as her hair. It was originally curly, but the straight hair shown here fits her better.
Technique: The lines are sloppy in some places. And the coloring has a few white pixels in it here and there. But with dedication and practice all those errors can be easily corrected.
Impact: Overall the little details create a rather appealing style to the piece. It's sketchy and simple. Not to complex and not overly done. And that's what gives it such a nice feel.