Hmm, rather old sketch.. from around the time of my last deviation :/ never got around to uploading it :/ anyway, done partly during maths (and you wonder why i got shit grades ) done with a normal gel pen which decided to leak while i was working on the hair :/ hence the odd looking black bit :/ had to cover it up...
anyway, thought I'd still upload, just for the sake of it...
Wow that's awesome that you got the pen to make gray values. I love her big hair and my goodness she's got a tiny little middle. For criticism, judging by the light coming from the top left, I think a lot of her left side could be in shadow. Her hair could use the same shadows on the left and some more shadows underneath the breast where it would cast onto the body. Great job anyhow even if it did come at the cost of your math grade.