Spoilers of The Maiden's Rhapsody FFXI, I can't believe this, XI and XIV crystals

[Pinkie_Pie]

It all comes back to The Grand Multiverse Theory in which all Final Fantasy Worlds are parallel dimensions loosely connected to each other via the great void and while many if not most share similarities and coincidences (Like how each world coincidentally has a scientist/engineer named Cid) they are all their own unique worlds that only interact with each other at all in rare occasions (Like Gilgimesh bumbling through the void willy nilly) . Vana'diel, Hydaelyn, and Ivaliace seem to interact with each other more than normal though.

Also, fun fact, In the Lightning Event Lightning was never physically IN Eorzea but her soul/spirit was being projected to harden her will to succeed in Nova Crystalis.

I love all the talking about this, this was driving me crazy about this ever since the lightning event started to happen and all these characters came to our world and then watching the XI final storyline just added more connections to each other. Many wasn't noticing this cause many didn't play XI but those who cared, noticed BIG time! The Grand Multiverse theory is a head bang desk kinda thing, THIS is the reason why doctor who didn't go into that sorta thing.