Goddess Sophia Lore posted.

[Hinoto-no-Ryuji]

As a final note, assuming the game lore is still relevant, I have to wonder if Fiend's lyrics might be about Sophia and then Zurvan.

I dunno, Fiend's lyrics are probably just about Sephirot, if they follow the established pattern of Primal songs up until now (and there's no real reason to assume they don't).