Sephiroth

Sephiroth is the embodiment of Cloud's darkness. He, along with Cloud, Tifa, Aerith, Yuffie, Zack, and Cid, originate from the Squaresoft game Final Fantasy VII, where he served as the main antagonist. Sephiroth is the only Final Fantasy villain so far to appear in the Kingdom Hearts series. He is also Darkseid's 2nd son. And Darkblade's mortal enemy.