Quote Originally Posted by Enkidoh View Post
Well, there was that soul-extracting technology Aulus mal Asina developed during the Ala Mhigan occupation as part of his experiments into aetherial enhancement (which led to the development of the Resonance procedure), which... Fannyboy and Zenos adopted for their own nefarious ends and used it on the Warrior of Light unwillingly, putting their soul into the body of a deceased Garlean centurion.

Luckily though, that procedure had severe limitations and only worked for a short time, with a transplanted soul ultimately rejecting their new 'host' and would be forced back into their original body. But it definetely exists.
Ahh, you're right! I'm not sure how I forgot that part, it was my favorite part of Endwalker. I guess I was stuck on the 'cloned body' as the primary element of 'move soul into a cloned body', and forgot that there was an instance of moving a soul without cloned bodies being involved.

So that basically gets us even closer to the ideal destination of 'we know they have the capacity to try it, they just weren't good at it'.