I read a blog post recently about how characters can come alive and take on a life of their own. They do not follow the paths that we have neatly devised for them. They make up their own minds.
A life beyond the story
Our characters are with us only for a limited time. They have a life before they joined our story and they will continue to live after we’ve finished telling it – unless we’ve killed them off! They have an off-stage life. This is true whether we’re writing a novel, a short story or a piece of flash fiction. We need to take as much care as with them regardless of how long they stay with us.