Quote Originally Posted by Squall of SeeD
Well, as you see in the opening FMVs of the game, the city gets leveled by Sin itself, so that doesn't in any way impede Sin's existance. More likely than not, however, Yu Yevon just repaired the damage and removed any memory of what took place from the minds of the survivors.
see, that's what I get for not having played the game for a year and a half. You're probably right, of course.

Sin isn't an Aeon anyway, actually. Sin is just a whole lot of Pyreflies held together by Gravity Spells.
how do you reckon? Sin (or at least this version of Sin) began as Braska's Final Aeon; doesn't that make it an aeon, still?