Before his fall from grace, Sephiroth was one of the most lauded success stories of the Shinra Electric Power Company's SOLDIER program. A great warrior idolized by the public and infantrymen alike for his strength and discipline in combat, Sephiroth's many successes in the field of battle during the conflicts surrounding the Shinra Electric Power Company's bid for global domination led to his status as a celebrity war hero and the poster boy for both the Shinra Military and the company's SOLDIER program.
After learning the truth behind his origins, and coming to believe he is the only remaining survivor of the Ancients, Sephiroth rebels against the Shinra Electric Power Company and enacts a world-wide vendetta against the "corruption" of humankind. His ultimate goal in the world of Final Fantasy VII is to take control of the Lifestream, and with its power and knowledge become a god-like being. In spin-off appearances, Sephiroth is depicted as Cloud Strife's archenemy, and is seen as a symbol of Cloud's troubled past that haunts his life.