Protagonist design #1

The first design I made for the protagonist of a new story I'm coming up with. Face close-up, full body and 4 different facial expressions. I'm not so skilled at using color pencils, and I had to take a picture because my scanner's low resolution made the colors look all whack, but, here it is anyway.
Although I haven't worked out all the details, I can say that her (tentative) name will be Cina, and that she'll be a hardcore mechanic designer (student).
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Anyway, I hope I can get down with this story of mine soon, but with school and other distractions, I may take a while. But, as always, comments are welcome...