Braig

Braig is one of the six apprentices of Ansem the Wise, and the original persona of Xigbar. He serves as a supporting antagonist in Kingdom Hearts Birth by Sleep.

Kingdom Hearts Birth by Sleep
Braig confronts Terra when he comes to Radiant Garden, claiming to have captured Master Xehanort. Braig leads the skeptical Terra underneath Radiant Garden, where he shows Master Xehanort chained to a large pole, to Terra's horror. Braig then engages Terra in a duel, intent on eliminating him and taking his Keyblade. Terra is reluctant to fight back out of fear of succumbing to the darkness and endangering Master Xehanort, until the latter screams for him to use the Keyblade and avoid shaming Master Eraqus. Terra fights back and eventually defeats Braig by using the power of darkness, in the process scarring Braig's face and permanently damaging his eye.

However, it later turns out that Braig was working with Master Xehanort. Angered greatly at the loss of his right eye and scarring on his face, Braig attempts to shoot Master Xehanort from behind, claiming that Xehanort said he wouldn't get hurt, but Master Xehanort threatens him into backing down and continuing with their plan to make Terra succumb to the darkness.

He later appears in the Keyblade Graveyard having succumbed to the darkness himself, indicated by his remaining eye becoming yellow, and his ears becoming pointed. He appears in front of Aqua and Ventus, attempting to get them to attack Terra and kill him for his role in the death of Eraqus, but they refuse to forsake their friend. After paying particular attention to and mocking the angry glare Ventus gives him, Aqua battles Braig for trying to turn them against their friend and defeats him. He begins to escape, and Aqua chases after him, but she realizes that she can't leave Ven in his fragile state alone, so she stops and allows Braig to return to Radiant Garden.

Later, back at the Radiant Garden, Braig leads Dilan and Ansem to an amnesiac young Xehanort, the result of Master Xehanort possessing Terra's body, and smiles discreetly but triumphantly to himself, relieved that his friend's plan worked.

However, Braig later approaches the new Xehanort, now an apprentice under Ansem, and is dismayed to find that the new Xehanort does not recognize him, and Braig's attempts to help Xehanort remember prove only to annoy him. Braig, at one point, questions if this new Xehanort is actually Terra, but Xehanort still does not respond, much to Braig's relief. Braig nevertheless says in a friendly manner that he's got Xehanort's back.

Between Kingdom Hearts Birth by Sleep and Kingdom Hearts 358/2 Days
Braig became one of six apprentices to Ansem the Wise, the ruler and scientist of Radiant Garden, alongside Dilan, Even, Aeleus, Ienzo, and Xehanort. After Ansem began performing tests on Xehanort's heart, Braig convinces the other apprentices to aid him and Xehanort in conducting inhumane experiments on the human heart and the darkness within it. Such experimentation led to the mass creation of Heartless. Ansem quickly discovered their secret experiments, and immediately ordered them to stop. One day, after being advised to review their research data by King Mickey, Ansem found that the effects of their experiments had become irreversible.

Eventually, Braig and the other five apprentices dabbled too deep into darkness through their continued experiments. Braig, along with the others, was consumed by the darkness, producing a Heartless. However, the apprentices all had strong wills, and so a Nobody was also created, Xigbar. The six Nobodies formed Organization XIII, and banished Ansem the Wise to the Realm of Nothingness.