Xemnas

Ranked as I and the Superior in Organization XIII. He resides with the group in The Castle That Never Was.

Key Plot Points
Xemnas realises Mandroxas' potential as a Keyblade Wielder, and shows him how to use his power.

Mandroxa and Xthanan are told to search their world for additional nobodies to induct into the Organization while fighting Heartless and collecting hearts. To ensure that nothing prevents Mandroxa from completing his tasks, Xemnas cuts the original members off from Mandroxa and the newer members.

Using his power of nothingness, he creates The Tree House That Never Was which is accessible from the Corridors of Darkness.

==Demise ==

Xemnas is the last member of the Organization to be defeated by Sora and friends in The Castle That Never Was when he attempted to become one with Kingdom Hearts.