Most writing guides and books would offer direction on how to write characters in addition in writing a compelling story.
You previously asked about storytelling resources
, so they might offer how to write characters. The books I emailed you, as well as the other list of writing books, do tell you how to write characters.
Why exactly do you need so many books on writing? The fact you keep asking for more implies that you never even read the books I sent you.
I had previously mentioned "Words for Pictures: The Art and Business of Writing Comics and Graphic Novels" by Brian Michael Bendis. He has offered advice on how to write characters:
"When in doubt, use your life. Use your relationships. Use your friends. Use your parents. It’s your job as a writer to write the world around you. Your perspective on that world is unique."