For those who were guessing, the version I'm noodling around with is Prokofiev's Cinderella. My wife and I went to see the ballet here a while back, and I've been obsessed with the idea of fleshing out a storybook or animated version ever since. What I find most interesting about Prokofiev's version is not only its unique variation on the story, but the sort of wistful tension that exists throughout the music, even in the playful and happy parts. I haven't found an appropriate style to match the mood of the music, but I'm working on it.
In Prokofiev's Cinderella, her father is still alive, but he's too old and broken in spirit to prevent the abuse she suffers. I like to picture that his weakness comes only partly because of age---so my idea is that he never quite recovered from the grief of his first wife's death, and the oppressive nature of his second marriage has worn him down completely. I wanted him to look like a lord or duke of some sort, someone whose family would be invited to the Prince's ball, and whose moderate wealth would attract the attention of an ambitious lady with spoiled daughters. I tried to reflect all these ideas in the design of his face.
Sorry the colors are so muddy, but I did it quickly (and figured it worked for someone who had lost the will to live anyway).