Grandmothers hypothesis(spoilers)

[Future Esthar]

The point of this thread is that they were descendents of Fang and Vanille.As I said:

Whether they are grandmother or grandgrand mother depend on many factors.

This. Vanille and Fang could not have been born when Cocoon was created so therefore their "husbands" could not have gone to live on/in it.

I think it´s possible to depart after it was made.
It´s not like everyone on Pulse suddenly hates Cocoon without exception.

Also, when does it say that Fang was married? I'm only on Chapter 11 but I'm pretty sure it would have been mentioned by then.

They didn´t remember everything.Even if they do I am certain they would not like to talk about it.

Also, there'd been no way for anyone to get from Pulse to Cocoon after it was created, more over after Ragnarok's attack.

Some eidolons and animals can fly.Cocoon is not a planet on outer space but an artificial world on the atmosphere of Pulse.
I am sure the sanctum Fal´Cie has a monitoring system that watches over the shell and decides if someone is a friend and foe letting them pass on the former´s condition.They are not dumb like the citizens.
It didn´t change after Ragnarok.

not too mention they are the same age as when they were turned to crystal.

You misunderstand.They had the kids BEFORE crystalizing.

Why exactly would you include Hope's mom is this theory?

Because all the characters belongs to either Fang or Vanille´s family.

Sara and Claire descends from Fang.

Hope and Snow descends from Vanille.

I will show you soon that Sazh is a Farron.

This is important to the storyline because there is a criterium which the Fal´Cie uses to select the ones to become l´Cie.

And what better than to pickup persons who belong to the same family as the ones fated to become Ragnarok and destroy Cocoon?