Can a character death be the catalyst for a canon update?

What I mean is, can a character be killed in the game, and when they come back, be from a different point in their canon (including the memory fog assigned to a typical canon update in this fashion, of course)?

And if it can, would a certain or certain memories of Ads never being gained back be considered a due? Or would there be an additional sacrifice, on top of the fractured memories?