I'm writing a story, in the format of a TV series. There are going to be more characters, but the first two "episodes" is where a character, who is a griffin, gets PTSD from a traumatic event, exits the dimension, and enters another one, where he meets a deaf girl named Cyan, who can wield magic using her unicorn-liek horn on her forehead. I want to learn how to correctly portray PTSD, and if I made any mistakes, how to fix them, and how I can make the story better. I am also afraid that my character Cyan is a Mary-Sue. What are the best flaws you can give a erson of Cyan's description. Here is the story link: Link removed by moderator.