I would like to use Fate Core for the kind of neo-noir stories common to movies made by the Coen Brothers, the Wachowskis, Quentin Tarantino, and John Dahl. The leading characters in these stories often die, sometimes before the climax. I would like to make it reasonable to play those doomed roles as PCs, so that players can engage in PvP conflict without worrying about the consequences for the victim.
Fiasco has an elegant mechanism to handle this (“Hey, You Just Killed Me,” p. 34):
In any session of Fiasco there is a good chance that people are going to perish. Your character is not immune from the carnage and may die. If this happens, it isn’t a big deal − Character death just means that your scenes will either be flashbacks or won’t include direct conflicts, you being dead and all. Your scenes should still be all about what your character wanted, and you can absolutely include other characters. . . . The Aftermath should be about your character’s goals, ambitions, or reputation rather than their physical person.
Fiasco is unique in that your character doesn't actually need to be present when you take your turn – you can tell stories about what your character wants instead. This allows you to keep participating even if some psycho kills you to death. How can I use this idea in Fate to have fun with a dead PC?
I suspect that you could use the Bronze Rule (Fate Core p. 208) to accomplish this: When “My Guy” can't be physically present, you can play “My Guy's Desires” as a meta-character instead. However, I'm not sure how you'd actually do that in practice. At what point should you create the meta-character? How should it differ from the character itself? Can you use it before you die?