When I did the other (green haired) mermaid the other day, I did a few "side art projects/gifts" for some other people and this was one I've been meaning to get to. I had made a sketch of Ariel combing her hair with her thingamabopper awhile back and have meant to add color to it. This is done with markers, graphite, and some colored pencil accents. While I was at it, I also did a watercolor version (for someone else) of this same pose, I'll post that tomorrow.
Here's the sketch version (note, I flopped the drawing too): [link]