If you are to write a fanfic with Fred and George Weasly that takes place in another universe than the books there is one thing you must NEVER EVER DO!!!
Kill Fred Weasly. His death is one of the most devastating of the fandom. Even Mrs.Weasly, in her worst nightmares, could not imagine Fred and George separated. When the bogarrt turned into the dead twins, they were TOGETHER! So if Fred and George can be together let them (not in a romantic way).
Comment if you agree!