Souls are different in CofD from how they are depicted in a lot of settings. They are not necessarily associated with the psyche or self, they are interchangeable; if you lose yours, you lose your ability to self-actualize, but if you obtain another, even if it's not the one you were born with, you will still be "you".

What, then, do you suppose would happen if a normal human swapped souls with a Remade? We know that the Remade have damaged souls; would gaining a whole soul "fix" the Remade, or at least stop its degeneration? Would the human with the damaged soul...