(Warning: Major spoilers ahead!)
A character who first appeared in Kingdom Hearts 2, he was a scientist who ruled over Radiant Garden, a
world that would be later named Hollow Bastion before being renamed back. He was overthrown by his apprentices, led by "Xehanort", who was actually
Terra possessed by Master Xehanort. He later donned a new handle, DiZ, which stood for "Darkness in Zero".
During this
time, he sought revenge against his apprentices, up to the point of being absolutely
harsh and discriminative towards Roxas. Towards the end of KH2, he attempted to "encode" the artificial Kingdom Hearts made by Xemnas using a special
machine, but it ultimately blew up and killed him. However, before it did, he realized the errors of his ways and apologized to Roxas.
Later, he was seen by Aqua in the Realm of Darkness, donning the
black coat of the Organization XIII, having lost almost all of his memories.
In
Dream Drop Distance, it was revealed that he stored some of his data inside Sora's memories
Then, in KH3, he is seen alive and back in the Realm of
Light, but it is unknown whether he is now a part of the Organization or not.
