This link is to a Dnews video regarding personality physiology, specifically, the big five. These five traits are what I use to create commingling and relatable characters. By choosing some traits to be represented more highly in your characters you can craft unique and memorable ‘people’. If you have two characters who share nearly identical traits, that’s a good sign you should combine them. As an example of how this is used, the fallowing link is to Captain Jack Sparrow’s personality psychology analysis.