Sephiroth, as he appears in Kingdom Hearts.Like all the Final Fantasy characters in the Kingdom Hearts universe, he is developed as an entirely different character. He appears as an optional boss in the game's arena setting using his various techniques from Final Fantasy VII. Sephiroth's third outside appearance is in another optional boss fight in Kingdom Hearts II. In this title, his role is expanded beyond its sub-quest status in the original game as he makes an appearance during the main story of the game, as well as being part of a sub-plot involving Cloud Strife. Sephiroth's history is not revealed, though he is said to be the manifestation of the darkness in Cloud's heart and states that he has fallen many times to Cloud, but always came back to fight again. After confronting Sora he instructs him to tell Cloud to come before him to settle things. Both engage in battle, Tifa eventually appears and fights briefly, before Sephiroth and Cloud resume their fight and disappear in a flash of light.