I was reading an article that said the best question to ask someone you’d like to know better is: If your life were a movie, what would it be called, and who would play you?
I would add, “right now” to that. Our lives change dramatically from moment to moment and year to year and we are not starring in the same movie we were ten years ago.
As an exercise:
Consider what your main character would call the movie they’re starring in. Who would play them? Now do the same for your villain and other characters.