Here's a sketch that I drew up with my graphic pencils and some coloured pencils. It was originally meant to be Konoko from Oni but then I stuffed it so it doesn't quite look like her. It's a sketch and I don't have a scanner (since my parents won't let me get one) so the quality is a bit crappy.
Here's the smaller, sharper version-
www.boomspeed.com/otakuroy/somegal.jpg
and here is the larger, less focused version-
www.boomspeed.com/otakuroy/purplehair2.jpg
I've already picked out a couple of problems... The ear is a bit too small, I've messed up the light sources, the armpit area of the right (our right) arm looks weird in this version and there looks like there is a problem with the collarbone + right shoulder.
I'm sorry about the eyes. Using the digital camera took away the detail in the eye.