About that, I just saw again the 2.3 scene where the ascians plot in their own world and they say something interesting that I forgot, they say that they want to make an awoken person ( which must means someone with the echo ) to a normal human to bring together what was separated, that might be what they want to do to Minfilla, take Hydealyn's blessing and possibly use it to summon Zodiark, as having echo grant us the possibility to help summoning a primal, maybe if they take it from a lot of people they can use this to summon zodiark.