These are the sketches I'll be submitting tomorrow for class. Gotta say, this was the easiest assignment I had for illustration. I'm pro at character design.
Also, really quick, since this is a sketch blog and going to be dealing a lot with concept art, please don't "steal" them. A lot of these come from my own imagination and I've worked hard to make my imagination churn these things out. If you do want to use any concept, at least ask beforehand.