Okay little thing about my writing style I actually just named that could be helpful when writing: The RRR method
Research, reference, and relate.
RESEARCH things you may be depicting. Things like trauma and its responses, disorders, religions, cultures, etc. When you're depicting PTSD like so many OCs end up having because of the things we sick writers do to them, you'll want to know what PTSD entails in everyday life and how it affects people. With culture, you'll of course want to know what the actual culture is in order to depict it! Don't just say "this character is Muslim" and then have them be drinking alcohol with a pork dinner.
REFERENCE your inspirations. It's just like using references when drawing. Look into the structure of your inspirations, how your favorite authors use suspense and subtext. Using references and inspiration is not stealing or copying or any shit like that! But it can easily bleed into that territory. I say this as mostly an artist who keeps tabs on the toxic community who thinks studying an art style is stealing it, etc etc stupid crap. If a character of yours ends up accidentally being similar to one you know from a piece of media, you don't need to pull a 180 on their writing! Overlaps are bound to happen, and that's okay. Reference those character's story arcs, behaviors, etc. and make it your own unique thing along the way!
RELATE details to other parts of the story. When people can see dots connecting in your story, that 'click' feeling is the best! Make sure that major points of character's story relate to other plot points, either in another character's story or the main plot, or both! Of course, you can have irrelevant details about people. But when you're talking about character-defining backstory, you should probably find openings to connect it to other areas of the story, that way it all comes together and becomes cohesive and relevant to each other.
This is just my own opinions and advice! You don't have to do anything I said here. I just managed to put into words how I write my own OC lore and worldbuild. This can work for authors, gamemakers, D&D players! (D&D players specifically because having a backstory that relates to the campaign is a really good idea and the DM WILL use that information against you in angsty sessions) If you found my advice helpful, I'm glad I could be of service :)
