I've been working on a story idea for a while, doing research and figuring out some of the plot. However, I have a major problem. My main character is currently a blank slate. I don't know who she should be. I don't know anything about her. Normally I have at least a basic idea of my character, and I can develop it from there. But this time I basically have no idea who my character should be. Can you think of anything I can do to develop my character?