I went through the main scenario CSs and nothing.. no person w/o shadow , now i'm watching Gridania story line and found this ...Nael hinting at a cooler world if Bahamut's destruction happens.

Nael Van Darnus:"Yes, but much brighter the light that shines forth from the void! Think of it, Gaius! Within that nothingness lies root of all creation (the mother crystal?) pure potential, limitless possibility!(a real reborn?) this is the wisdom of the ancients!"