According to the Yevon religion, Sin is reborn from all the sins of the people, like using the forbidden machina. So you're both wrong! I even told you in the hint that it wasn't the truth, which is actually Yu Yevon merging with the Final Aeon.

A: Don't you mean Ascalon? If that's what it is, it is in the Sanubia Desert after finding a secret location on the Airship. Otherwise, I have no clue.

Q: Who needs the Saturn Crest and the Saturn Sigil for their Celestial Weapon?

Bonus question: What does FQ stand for, anyway? I keep seeing that when people skip their questions.