
Originally Posted by
Andromeda
That not I'm sure. He was praying to the planet or lifestream whatever, but I don't know she needed to be in the lifestream to manipulate it. Because she died though she did return to the lifestream, where everyone goes back to if I'm remembering things right. It is also the will of the planet or something, since the planet can actually take action by using the lifestream to heal or defend itself. The weapons are part of that defense system. So I sort of doubt Aerith was needed for anything. The planet was going to probably act in defense of itself anyway, which Sephiroth wanted. Well he planned to make enough damage to do so, but it gathering as a preventive measure or after the fact still worked in his favor.
Though Aerith being in the lifestream and Cetra probably is the reason she can still exist as a single consciousness and do all sorts of hand wavy things to help out Cloud.
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