[ This is coming from Machina, who has never seen a ghost or even believe they exist in his world. But there! Are stories! ]

And the locals want to return to how they looked like... that?

[ All with normal, not-robotic bodies. He's seen various prosthetics for soldiers and veterans alike in his world, yet to do the opposite, such as re-growing a lost limb? ]

I can't imagine how something like that would be possible.