angra mainyu (deleted)
Major antagonist in the Fate series. He participated in the Third Holy Grail War but was defeated. The Holy Grail became corrupted as a result, turning it into the equivalent of All the World's Evils.
Angra Mainyu appears as the irregular Servant Angra mainyu in Fate/Hollow Ataraxia, replacing Cu chulainn as Bazett Fraga McRemitz's Servant.
In the Heaven's Feel route of Fate/Stay Night, he becomes Matou Sakura's Servant.