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It's my understanding that when 'The calamity form the sky' crashed into the planet, Jenova saw the Certa as a threat so she changed her appearance into a Certa female and interacted with the population, infecting them with a disease that devastated the population.
Personal theory is that it's another meteor from 2000 years ago ... but at that time it was the combined power of the Certa population and the promised land (I really feel that it isn't there anymore and the Sleeping Forest is only a husk of what it once was) to stabilize the planet and keep it alive.
Then once Jenova was finally contained (not defeated) the surviving Certa became nomadic trying to find their own promised land.
With that said, I think that Aerith found hers with what she did with the flower bed at the church in the slums and around her house.
In addition, since it seems that when Jenova was imprisoned while masquerading as a Certa female, when she was found again, she was easily mistaken to be a Certa when the true survivors state otherwise.
.... Come to think of it now... it could be why Aerith's mother died... she may have been exposed to Jenova cells and had become infected like their ancestors 2000 years before.
... But all this is personal theory. I hope it helps. |
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