Writer should know his/her characters. We should know real humans, with real motivations, real fears, real situations, real environment.... to know the characters - if possible. Wanna write about love? Have you loved the same way? Wanna write about addicts? How many addicts you know well? Wanna write about killers? Do you know anyone who has killed a human being? How many that kind of persons do you know? Wanna write about depressed, autistic, lonely, looser or... How much time you have spent listening to depressed or autistic or... We are talking about character development technics. The best technic is to know humans that are totally different than us, live in totally different situations and think & feel totally different way. And I don't mean "to know" like some identity politics bs, but to really know. Are we building a bubble of words and technics around us so that we don't need to be in touch with the real world and real humans? Do we meet characters instead of people? Do we live in the wrong side of parody horizon? Theme and characters are interlocked. Storyline and plot rise from characters. Dialog is a representation of characters.... We can't get our hearts to our characters if we build and keep barriers & pecking orders between us and real world real peoples. And if we don't, our characters will be cardboards coloured by numbers. So... How to do character development? 1. Do some serious self reflection. Focus on what's not there in your inner & social life. 2. Get what you didn't find. 3. Check did you get it? Long after that are technics and other stuff.