Someone whose opinion I find highly valuable said that in this story I wrote, the main flaw is the MCs don't really have personalities. It's a short story, and I'm trying to meet a contest deadline which is in six days, so I have limited space (words) and time (deadline). How would you go about developing an MC's personality in such limited space/time? Some ideas I had for what I might do today is make a very thorough character development chart from somewhere online and then plug various elements into the story in subtle ways. Not sure what else to do.