Xehanort

Master Xehanort is the main antagonist of the Dark Seeker Saga in the Kingdom Hearts video game series. Along with his many different incarnations, including Terra-Xehanort, Ansem, Seeker of Darkness, and Xemnas, Xehanort has been responsible for the massive destruction across the worlds and the antagonistic bodies that have plagued them, and personally responsible for the tragedy to those who have crossed his path.