It can be difficult. And I speak for myself on this. I’m trying hard to make all my characters as three dimensional as I can without making them come off as (the term being) Mary Sue/Gary Stuish.
Though all my characters have their own quirks and personalities that half the time I forget they are actual characters. But that’s just me being biased about my own story. As far as I can tell, I’m able to differentiate everyone from one another. So I guess I’m on the right track.
I just hope when I’m applying things like disabilities, it’s believable. This is where the research part comes in but I can only do so much until I have to seek someone out for help.
With this revision, all of my characters became stronger. I can’t wait to finish!