Well, in my experience, yes. You can reconstruct the flesh, and return a soul to it long after it has fled - provided it is willing and able. Such things are difficult and often complex, but it's possible. And I'd avoid being condemned to the Hells, Karlach has quite a few disturbing stories.

[ hell is also very real in dnd world! but probably is not as easy to get to as simply being a bad person.

he blinks at the question though, and then seems a little awkward, bringing a hand up to chew at a nail. ]

You talk as if I have a future to experience such things.