The main villain of the hit PlayStation game, Final Fantasy VII. Considered by many (including myself) to be the best video game character of all time. Not only does he look completely badass, but his character is so complex and so troubled...this kind of darkness and depth were never expected from video games of that era, much less in this era. Sephiroth sets the standard that many game characters are made to reach, most if not all unsuccessfully.
A VERY short story description:
Sephiroth was a troubled man who never knew his true identity...after discovering that he was merely created as part of an experiment and that ancestors of humans were traitors to the planet, he embarks on a journey to eradicate humans from the planet and to merge himself with it. Since his mother, Jenova, was not one of the cowardly ancestors (Cetra), he believes he is the rightful heir to the planet. His evil accomplishments include destroying the entire city of Nibelheim (except for the main characters), murdering the president of the most powerful company on the planet and his former employer, Shinra, and summoning Meteor to destroy the planet.
Basically, Sephiroth is the epitome of badass, and is the character that all video game characters wish they could be.
Bottom line, Sephiroth owns.