Overratedroth.

[Sephiroth]

JENOVA is the source of all evil. It all began with JENOVA once "she" arrived at the planet 2000 years before the story - and even before that it travelled around to absorb planets. But it is not the main villain. And it happens all because of Sephiroth. That is how it is. He became the new JENOVA at the moment his mind got stronger and he wanted to rule all souls.

And Sephiroth controls JENOVA's headless body. Not JENOVA itself does, so he is controlling it. He started its Reunion. Not JENOVA itself. He wanted it to start the reunion and then he has shapestifted its headless body for his own purposes. He is the perfect form of JENOVA because he has "her" abilities and even a greater will than her and JENOVA already was most likely the most powerful being before him.

And using Wikipedia for Final Fantasy in a discussion is the greatest joke ever. Every single idiot can edit Wikipedia, so even if there are 2 guys who write the truth, 8 other guys who don't have an idea will edit it. Square knows it way better than Wikipedia.