Master Xehanort is the main antagonist of the Kingdom Hearts series, as all the misfortune and issues that the Kayblade wielders must face trace directly back to him. He was originally from Destiny Islands, but left to train to be a Keyblade wielder, after claiming that the Islands were too small. He and Master Eraqaus were trained by the same master, who is unknown. It is revealed in BBS that he has grown old and had an apprentice of his own, Ventus. He is known to have dabbled in dark magic, as well as being the proclaimed keyblade wielder best at magic. All other antagonists in the series can be pretty much traced to him, at their root.