Have you tried using a resist yet? Ayala asked this in a post on Facebook today, which reminded me that I hadn't tried using a resist. So thanks to Ayala for suggesting this. I love using crayon resists with watercolor. It's like magic when you paint over the crayon and the lines appear. I did use a reference for this face, which I am finding very helpful, even if I am not striving for realism or an exact likeness. As I worked on this face, I added shading and details with pencil and marker. The leaf shapes were an unexpected bonus in her hair that I couldn't, um, resist.