One Question That Needs Clearing Up...

[Renmiri]

In a sense. Sin really is an armor; it ostensibly would prevent anything from interrupting Yu Yevon while Summoning the Dreams of the Fayth.

Another explanation by Maechen involves the destruction of Zanarkand; in the passage, Maechen shows that Bevelle arrived at Zanarkand after Sin appeared, and later discovered the city already destroyed.

This extends naturally into Maechen's remarks on the original Final Summoning. Following the above chain of events, "rumors flew in Bevelle [concerning the appearance of Sin]." As it became known that Sin was Yu Yevon, they (Bevelle) understandably reacted with fear.

Also of note, regarding Maechen's remarks, is that the Hymn of the Fayth was first heard as Bevelle advanced on Gagazet. As the Fayth are later discovered singing this hymn, we know that the Fayth (and therefore the Dreaming) also began prior to Bevelle reaching the ruins of Zanarkand (once again consistent with the established continuity of FFX).

Great stuff, thanks!

Yes, you are correct, Bevelle would not have talked to Yu Yevon. That still leaves Yunalesca though. She may have been the one to come up with the demand to worship her father's name.
Darn it, lots of rewrites needed in my FF, as I had Yu Yevon conscious and human after Zanarkand died.. My Yunalesca story is shot!!!
http://www.fanfiction.net/s/2687313/1/

BTW, since you seem to know so much, do you know who is Pennance and how does he fit in all this ? He is the guy who shows up after the battle with Jecht in FFX international version