Quote:
“Strongest of the scions created by the gods, they feared his growth, and so kept him a child. So indomitable is his strength that all things are by him twisted and pressed into oblivion. He alone fashions the laws governing all things, and administers punishment in place of the gods. So is he Keeper of Precepts, and his authority is absolute.”
—Clan Primer Bio
I know that they in no way are going to do a straight port of him because that would be both incredibly lazy and not work with the story at all, but maybe this holds some clues to his true purpose? For example, if Lahabrea is telling the truth and that Hydaelyn is some sort of parasite--something foreign to the world--and Zodiark is, in fact, the 'One True God', then one could easily assume that Zodiark controlled the world much more differently than Hydaelyn. Hydaelyn is very