Master Xehanort

Master Xehanort is the main antagonist of the Dark Seeker Saga, the first phase of the Kingdom Hearts franchise. He is the original incarnation of Xehanort from which Ansem, the Seeker of Darkness, Xemnas and all others spawned. He manipulated almost every event in the series, and devised many backup plans that involve dividing his heart among 13 different beings created from his power and take over the universe.

Master Xehanort was a Keyblade Master, the first master of Ventus, and the creator and master of Vanitas, the original incarnation of Ansem and Xemnas and the future self of Young Xehanort. He served as the main antagonist and final boss of both Kingdom Hearts: Birth by Sleep and Kingdom Hearts III and the overarching antagonist of Kingdom Hearts 3D: Dream Drop Distance, being the true villain who has orchestrated the whole event.

In the English version, he is voiced by the late Leonard Nimoy (who also played Sentinel Prime in the Transformers series) in Birth by Sleep and Dream Drop Distance, the late Rutger Hauer in Kingdom Hearts III, and Christopher Lloyd in the ReMind DLC and Kingdom Hearts Melody of Memory. In the Japanese version, he is voiced by the late Chikao Ōtsuka in Birth by Sleep and Dream Drop Distance, and by his son Akio Ōtsuka (who also voices Ansem, Seeker of Darkness and Terra-Xehanort in the same series) from Kingdom Hearts III onwards.