Kefka eventually turned against even the Emperor and killed him, during that time also moving the statues preserving the balance of our world out of alignment, destroying that balance and provoking a world-wide catastrophe. Thanks to this, the world's topography drastically changed and many lives were ended. He absorbed the statues' power, becoming akin to a god himself.

[She bites her lip and looks down.]

I don't know much about after that point, because I'm from a point in time when that just happened. My friends said we defeated him, but we must have had far more powerful magic at our disposal for that, magic that I don't personally know or can gain, here.