Ansem

Ansem, Seeker of Darkness, sometimes referred to as Xehanort's Heartless (played by Christian Bale), is the one of the main eight antagonists of Sonicverse, as well as a supporting antagonist in ''Kingdom Hearts. He is a member of the real Organization XIII and the Heartless of Terra-Xehanort, and as such his appearance and personality are primarily derived from Master Xehanort, and he retains his original form's "shadow".

Ansem was created when Terra-Xehanort, masquerading as Ansem the Wise, reawakened his sleeping memories and split his heart from his body, creating a Heartless; this Heartless, also named Ansem, appears to have characteristics of both Emblem and Pureblood Heartless, and it is unclear exactly which category he falls under. However, because Terra-Xehanort did this of his own will, he retained his memories in his new existence, and gained the ability to control the other Heartless. With their power, Ansem attacked the Realm of Light, intending to have the Heartless consume the hearts of every world and lead him to Kingdom Hearts.