There is absolutely no reason that a character should ever be immutable, unless they've become a god-figure, and last I checked, that's happened once, on War Island.
This sound interesting. Can you tell us this story?
Logged
"Resolve to serve no more, and you are at once freed. I do not ask that you place hands upon the tyrant to topple him over, but simply that you support him no longer; then you will behold him, like a great Colossus whose pedestal has been pulled away, fall of his own weight and break in pieces."