In Necrons defense, he was the final boss, but he wasn't really a Villain. He didn't have anything to do with the events of FF IX, and was summoned only when Kuja destroyed the Crystal, his last ditch effort to satisfy his own desires. That last fight was, for all intensive purposes, a way to demonstrate the Will of Zidane and Company, not some twist plot point at the end.

He was summoned by Kuja's strong desire for an end, yet repelled by the others desire to move forward.


That being said, I would say Ultimecia, but you do get to at least see some of her personality through her controlling Edea, so while I hate her and that game, I'm going to give my vote to Sephiroth.

First off, his back story is a stretch. "I was created to be a super soldier? Imma find mommy and destroy the world!" I can fully understand wanting revenge on those who did it to you, but to desire devouring the planet, becoming a god, and devouring other planets? No thanks.

And all of his villianry was kind of lame. Except the destruction of Neifleheim, or however it was spelled.

I'd say Aerith dying, but the impact was probably lessed for Aerith being a rather unlikeable character to me. And he didn't really do it to be evil, he did it because if he didn't his plan would fail.

Compare that to the other villians. Kefka poisened an entire kingdom killing innocents and even his own men for convenience. Kuja destroyed the face of Terra and turned an entire continent against eachother, killing countless people and corrupting hearts.

Hell, even Yu-Yevon creating Sin to reek a never-ending destruction upon Spira.

Even amongst the lamest of the FF Villians Sephiroth really hasn't done anything that makes him stand out.