Ansem the Wise

Ansem the Wise (voiced by Corey Burton) is the former sage-king of Radiant Garden. Many years before the game's current timeline, Ansem the Wise became worried that the darkness of people's hearts would one day swallow his beloved home. In order to understand the heart and counter darkness, Ansem began conducting tests on Xehanort's heart, and eventually constructed a large laboratory in the basement of his castle. However, Ansem's six apprentices used the laboratory in order to conduct inhumane experiments on the human heart. Ansem immediately ordered his apprentices to cease their experiments and sealed the chamber. Ansem's friend, Mickey Mouse eventually advised Ansem the Wise to review the research data. After reading the truth, Ansem began to see that the damage he had done had become irreversible. Eventually, the six apprentices dabbled too deep into the darkness and were consumed by it, and plunged Ansem into the Realm of Nothingness.