You have your protagonist and antagonist but what about those secondary characters. After all, a painting isn’t a single color. It has a supporting cast of colors to make the picture come alive.
That’s why you need complicated, well built, and fully formed secondary characters in your story. To make that perfect world in which your protagonist can overcome and conquer all.
Below is an article from NYbookEditors that will walk you through the steps of crafting believable secondary characters. There is also a video of the types of characters each novel should have. I hope you enjoy and use what you learn to sell more books🤓