Ghostwriter

Hm. My inclination is to extract them wholesale, honestly.
Suddenly being placed in a universe not their own would be difficult enough for them without having to ask uncomfortable questions; questions such as their relation to their original remaining in the nickel.
Or they might wonder if they are the original, and a duplicate is living their life inside the nickel.

I don't suppose this sort of thing comes up often when working on nickels?
Have to imagine more than a few ghosts have voiced their concerns on the matter.

It comes up plenty often. Some small part of me questions why any creation would hate their creator. There is no perfect way to do this job, there is only the truthful way, and lying to any person about their existence is outside my comfort zone. If there are two copies of a consciousness, they are different people the moment they interact with a different environment. But ghosts can be petulant, and they will ask the question relentlessly.

If it's the will of you all, I will indeed extract them wholesale. For some consciousnesses, it is reassuring to know some version of themselves is completing their 'arc'-- but again, this isn't inherently necessary. Neither option lacks its flaws.