Quote Originally Posted by Trunks View Post
If the Echo prevents tempering, how were the Ascians tempered by Zodiark? It’s been heavily hinted that the Echo is either an innately Ascian power, or a power Ascians possess. If it prevented tempering, they too would be immune.
The echo, as far as I can guess, is something that only Sundered former Ascians have, or at least their souls. It basically is an indicator that their soul was there at the sundering (as far as I can tell from Elidibus' hints). Elidibus/Lahabrea/Emet-Selch don't have it because they're Unsundered, they wouldn't have it simply because they weren't touched by the Sundering.