Sephiroth (セフィロス, Sefirosu?)is the central antagonist in the Squaresoft role playing game Final Fantasy VII. He is considered one of the most popular villains of the Final Fantasy series, and has had � relative to Final Fantasy VII's continuity � four non-canonical appearances in other games: Ehrgeiz, Kingdom Hearts, Kingdom Hearts II and Itadaki Street Special. Within the continuity of Final Fantasy VII, Sephiroth has also made appearances in the mobile game Before Crisis: Final Fantasy VII, the CGI film Final Fantasy VII: Advent Children and the midquel OVA Last Order: Final Fantasy VII. His appearance was designed by Tetsuya Nomura, and his name derived from the Kabbalah, in which the ten sephiroth on the Tree of Life represent different aspects of God.
Sephiroth appears as a tall, handsome character with long silver hair, bright emerald green eyes, a long black coat, and metallic pauldrons (shoulder guards). He carries the sword Masamune, a weapon that has appeared in each installment of the Final Fantasy series. In Final Fantasy VII, Sephiroth was the most famous member of SOLDIER, the paramilitary branch of the Shin-Ra corporation, until he mysteriously disappeared five years prior to the start of the game. He then returns to enact a sinister plot which threatens the game's world, bringing him into conflict with the game's protagonists, and particularly with its main character, Cloud Strife, who shares a past with Sephiroth.