Sin Eaters

[manamoppet]

So the ShB page updated, and it seems Innocence is a being that stands at the top of the Sin Eaters:

Innocence sits at the top of the heirarchy [sic] of sin eaters─the beings that emerged from the Flood to plague what remains of mankind. Beyond that, its nature and purpose remain shrouded in mystery.

Source: https://eu.finalfantasyxiv.com/shadowbringers/story/