Nature of the Sound

[Kesey]

So... I'm thinking Jenova, or a Jenova-like entity, with Fancy Dan's plan bearing shades of the Lunatic Pandora and the Lunar Cry.

This is interesting, but I thought this game's Lunar Bahamut was a call back to Zodiark, who is in the moon, not the sound. In fact there is no evidence (yet?) that Fandaniel is associated with the sound.