Helping Writers become Authors:
Creating an amazing supporting cast that can offer important relationship dynamics in fiction will also help develop your protagonist. This isn’t just because great supporting characters will add color, drama, and nuance to your story in their own right. It’s also because every supporting character in your story has the ability to bring out new dimensions and complexities within your exploration of your protagonist.
The primary way this is done is simply through the relationship dynamics between your protagonist and other characters.