i just saw this website, and someone named Sébastien Andrivet and Darci write a great grim dawn OC there, so i feel like sharing it here. give it a good read. its wonderfully written:
https://www.writeups.org/grim-dawn-game-sample-character-profile-1/
there might be other grim dawn writers out there, so if you saw writings like above, feel free to share it here.