Hiorou brought up a good point regarding Kess's head. She mentioned that she looked like she didn't have much of a forehead, and so I took a closer look at this piece. My characters don't have much in the way of foreheads to begin with due to their large eyes and their eyebrows' tendency to get up pretty high, but something was still off with this piece.
I went back and resketched her head and found that the top of her bandana was too low. While I've never drawn Kess without her bandana, I can assure you she has a full head of hair under there and my original sketching and inking failed to account for the volume of her hair. Thus, I went back and made some adjustments to the bandana to give her a better-looking head.
Thanks, Hiorou! ^__^