Veteran games dev community manager & designer. Loves 
He/Him
Or each time a ghost dies, it comes back as even more transparent, until finally it has faded away completely. 
May not even be too hard to make that happen... 
Thanks, Saffi! Strangely, I've never had a playable sim in my game, so it's something I'd like to do sometime. It would surely be sad when they did finally fade away to nothing though. But maybe there could be a way for a sim to restore themselves and avoid fading for a while.