This exercise comes to on behalf of the lovely Cynthia Leitich-Smith. I took a class from Cyn at the WIFYR conference last summer. In preparation for the class, we were asked to come up with a theme song for our protagonist and our antagonist.
I know a lot of writers make playlists for their books, but it’s slightly different to have to come up with one song that completely defines a character, a song that screams THIS IS WHO MY CHARACTER IS. Now I do this for all my characters. Very fun, very helpful. I highly recommend it.