Sephiroth used to be a high ranking Soldier member before he disappeared five years before the beginning of the game. He was known as the best member of the Soldier group, and is very skilled with a Masamune. The majority of the story of Final Fantasy VII revolves around Sephiroth's plot to become a god and destroy the planet by summoning Meteor. It is up to Cloud and his gang to stop him achieving these goals.
The other pages of this section contain many screenshots of Sephiroth.