Is it implied that Quincies dont age after getting a scrift from Ywach?
Or turned into souls after hiding in the shadows of Soul Society
Or turned into souls after hiding in the shadows of Soul Society
Shifting Sands
It was never clearly explained, but it seems likely that Yhwach's soul influence may be the reason for it. Normally Quincy are just humans who age normally like anyone else. They aren't immortal even with their powers. But that Bazz-B and Haschwalth were alive 1000 years ago does imply the Sternritter are different.
L. E. Gant
A long-winded story ? (https://www.dsl.ac.uk/entry/snd/scrift)
I guess they die of boredom.