|Origin||Kingdom Hearts: Birth By Sleep (2010)|
|Age||True Age Unknown; Older than 60|
|Home World||Destiny Islands|
|Weapon||Master Xehanort's Keyblade|
- "I admit that your return meant that I had to alter my plans, but my plans are still progressing fast. I thank you, Terra, for allowing me use of your body as a vessel for all these years. I thank you, Aqua, for rescuing Terra from the Darkness, so that he - and through him, I - could live. And I thank you, Ventus, for defeating Vanitas and proving my calculations correct."
- —- Master Xehanort to Terra, Aqua and Ventus
Master Xehanort, from Destiny Islands, is a former Keyblade Master, the original form of Young Xehanort - and through him, Ansem, Seeker of Darkness and Xemnas - and the former Master of Ventus.
Master Xehanort is the original form of Xehanort - and thus, the original form of Ansem, Seeker of Darkness, and Xemnas - and possessed Terra's body twelve years ago. This, unfortunately for him, made him lose his memories and he was found by Ansem the Wise, who took him in. Eventually, he regained his memories, manipulated Ansem's other apprentices into falling into Darkness, banished Ansem and stole his name. Falling into Darkness himself, his heartless became Ansem, Seeker of Darkness and his nobody became Xemnas, the leader of Organization XIII. Now that Nobody and Heartless have been destroyed, he has been ressurected, and is on the offensive.
Years ago, Master Xehanort was in control of Vanitas and used him to fill the worlds with Unversed. Ultmately, through the intervention of Terra, Aqua and Ventus, that plan failed, though Master Xehanort had intended it to fail; his real plan was to get a new body - that of Terra's - to use as his own. Through the intervention of Aqua, the being created by the merging of Terra and Master Xehanort lost its memories; eventually, it regained them, fell to Darkness and spawned Ansem, Seeker of Darkness and Xemnas. Now that both have been destroyed, Master Xehanort has been resurrected.
Master Xehanort is the former master of Ventus and the reason for Ventus, Terra and Aqua being seperated and trapped in their respective situations. His plan this time, is unknown, though it does involve a mysterious figure with some connection to Vanitas.
Master Xehanort's plan is to fill the worlds with Unversed and take over all of them in his mission to retrieve the seven Princesses of Heart. It's up to Sora, Riku, Kairi, Ventus, Terra, Aqua and King Mickey to defeat him and protect the Princesses.
Master Xehanort does not appear until near the end of the story.