Sephiroth, the One-Winged Angel

Sephiroth is a former member of the group SOLDIER, a group of humans that have been infused with the cells of the alien life form Jenova.

When on a mission in Nibelheim, Sephiroth discovered the truth of his past and went insane, burning down the village and slaughtering all the people. He was thought dead after the incident, but resurfaced five years later, plotting to summon Meteor to destroy the world and become a god. Sephiroth is cunning, manipulative, and has no redeeming qualities whatsoever.

With his skill in swordplay and dark powers that possess great strength, Sephiroth is the most feared villain in the whole Final Fantasy world!

Chronicles of the Children of Megatron

In this story, Sephiroth is the high priest of the Temple of the Decepticons. He is also in love with Darth Menslady.