Not gonna lie, I had kinda forgotten by the final scenes in Endwalker that Emet was directly or indirectly responsible for the deaths of thousand across multiple fractions. Which I guess thinking on it kinda again leads me more to thinking Zodiark was in fact tempering the unsundered given Emets higher regard for life(even familiars) in Elpis. So either Emet had homicidal tendencies all along, or Zodiark did have some form of self-being outside of just being a tool or vesel that forced the unsundered to reform him by any means necessary. Not that there is any proof of that in what we currently have, but it was just a though that crossed my mind.