Later during the story, Xemnas appears along with Braig to Sora and reveals the true reason behind Organization XIII. The formation of the sinister group was to assemble 13 beings of strong hearts to be used as vessels of darkness to store fragments of Master Xehanort's heart in order to turn them into clones of himself. Then with his clones, Xehanort would combat the seven defending lights of the worlds to recreate the X-Blade to unlock Kingdom Hearts and incite another Keyblade War. His Heartless counterpart in the meantime targeted the seven Princesses of Heart through the manipulation of Maleficent in order to eliminate their hearts of pure light and make the worlds defenseless against the great darkness and unleash billions of more Heartless into the universe. Braig reveals himself to being the first of these clones before becoming a Nobody, telling Sora that he has a fragment of Xehanort's heart inside him and is already half of Xehanort (explaining why he was a yellow eye and pointed ears). Braig's motive for agreeing with Xehanort's plans was so that he would be able to wield a Keyblade once becoming a full clone, though he would slowly lose his will and mind to Xehanort in return.
Xemnas also reveals that nobodies are indeed capable of cultivating hearts again within them over time and develop emotions as in the case of Roxas, Namine, and Axel. However, knowing that the members of Organization XIII wouldn't suit his plans if they grew hearts back, Xemnas and Braig deceived all of them by telling them that the only way to recover their hearts is through establishing Kingdom Hearts. Once Kingdom Hearts was finished, Xemnas intended to use it's power to fill every member of the organization with fragments of his heart and darkness, but almost all of them, except for Xigbar and Saix, proved to be too weak or turned traitorous. Xemnas reveals however that he predicted this and took precautions to recreate the Organization through the enlistment of his younger self, who crosses space and time to gather Xehanorts from different timelines to fill in the empty ranks of this new Organization. Sora is disgusted at how Xemnas and Braig have commissioned the heart as an experiment and tool to commit heinous atrocities to countless worlds and millions of innocents and fights Xemnas once again, who is soon defeated but escapes to join the rest of his counterparts.
Xemnas also reveals that nobodies are indeed capable of cultivating hearts again within them over time and develop emotions as in the case of Roxas, Namine, and Axel. However, knowing that the members of Organization XIII wouldn't suit his plans if they grew hearts back, Xemnas and Braig deceived all of them by telling them that the only way to recover their hearts is through establishing Kingdom Hearts. Once Kingdom Hearts was finished, Xemnas intended to use it's power to fill every member of the organization with fragments of his heart and darkness, but almost all of them, except for Xigbar and Saix, proved to be too weak or turned traitorous. Xemnas reveals however that he predicted this and took precautions to recreate the Organization through the enlistment of his younger self, who crosses space and time to gather Xehanorts from different timelines to fill in the empty ranks of this new Organization. Sora is disgusted at how Xemnas and Braig have commissioned the heart as an experiment and tool to commit heinous atrocities to countless worlds and millions of innocents and fights Xemnas once again, who is soon defeated but escapes to join the rest of his counterparts.