Originally Posted by
Zeargi
The reason I believe the 5 terrestrial avatars are part of Promathia's soul is that:
He's referred to as the 'Twilight God,' not the God of Darkness, Not the God of Evil, the God of Twilight. Which means he is the inbetween of Dusk and Dawn. He also houses the lights of the Races, (Which could be the link to Carbuncle) He is the reason for the empty which inflicts eternal slumber (Diabolos). He is proven to become Shinryu, the God Dragon (Bahamut), Again He's the God of Twilight, so he also verges on the Night (Fenrir.) He can also be re-born (Phoenix). In Abyssea, you not once come across Bahamut, who commands All other Greater Dragons. Where is he? He already said that he'd plan to kill everyone if you failed. But magically, people are still alive, and there are still hordes of Greater Dragons roaming around. Where's Fenrir, He still would honor his pact, and have defended Windurst. Neither of these Avatars would have simple "Peaced out." Both are Prideful, and would have fought.