She studied his journals with great care and attention, and learned just what to say to bug the bugs out of him. Duane has ALWAYS been trapped between two conflicting commands: Do Not Rot, and Do Not Bring Yourself To Death. If he didn't replace his limbs over the years, he'd become immobile and helpless, which would lead to his destruction. And yet any limb he put on him was flouting Ssael's decree against decay. There's never been a solution that left him feeling anything but damned and failing.
But at least it looks like Nora's going to gracefully give him back his eyes.
(I like her possessively wrangling his bare forearm bones with her naked hand, it's kinda metal)