Before Kingdom Hearts Dark Road
As some point, Luxu comes across Bragi and chooses him to be his next vessel to continue his mission.
Kingdom Hearts Dark Road
Bragi and his classmates in Scala ad Caelum are summoned by Master Odin to investigate the unexplained disappearance of upperclassmen who were visiting other worlds in preparation for their Mark of Mastery exam. This is an unusual task, as lower class students are not typically allowed to travel between worlds.
When it comes time to set off, Bragi suggests letting Xehanort take the lead, since Xehanort comes from the outside world, unlike his fellow students who have never left Scala ad Caelum.
The group explores Agrabah, Wonderland, Beast's Castle, and other worlds, eventually encountering the upperclassmen and their own missing classmate, Baldr. They discover the upperclassmen, led by Vidar, are attempting to steal key items from each world to upset the balance of the world's order, hoping to draw out pure light and summon Kingdom Hearts. They also learn that Baldr's sister Hoder was killed protecting Baldr from Maleficent. The group visits Olympus Coliseum to venture to the Underworld, believing that Hades will be able to summon the spirits of the lost upperclassmen to learn more. There, the wielders split up; Bragi accompanies Eraqus and Xehanort, and the three encounter Cerberus. Baldr arrives to help and helps Bragi defeat Cerberus, while Xehanort and Eraqus continue ahead.
Though the two Keyblade wielders defeat Cerberus, Bragi has become suspicious of Baldr, believing him to harbor great darkness. His suspicious were correct, and Baldr confronts Bragi. However, Bragi swiftly overpowers Baldr with unprecedented strength. Instead of continuing the conflict, Bragi chooses to disappear; he walks away, never to be seen by any of his classmates again.
Later, Baldr launches an attack on Scala ad Caelum. In the tower, he tells Vor that Bragi died at his hands along with the other wielders. Even after Baldr's eventual defeat, Bragi is believed to be dead by Xehanort, Eraqus, and Odin, and a gravestone is erected for him in Scala ad Caelum.
One month later, Luxu walks the graveyard of Scala ad Caelum wearing a black coat. He laments on not having found the chosen one yet, but remarks Xehanort could be useful. Luxu removes his hood, revealing Bragi's face. Although he has decided to keep this vessel for the time being, he notes that Bragi's supposed death will make it hard to show his face.
Bragi is a young man with brown eyes and left side-parted reddish-brown hair. He wears loose black-colored pants and a black jacket resembling a Japanese martial arts gi, which he wears over a dark blue jacket lined with white fur on its hood. He also wears black sneakers with laces and white soles. At his waist, he wears two bronze-colored belts that cross, forming the Mark of Mastery, underlined in white and gold at the intersection.
His Keyblade armor is orange-red and adorned with fur at the shoulders, with the Keyblade Symbol in bronze on his forehead. The fins of his helmet stretch very high, resembling the helmet of Terra's armor. His armbands also have a very pointed fin.
In Norse mythology, Bragi was a name given to several characters associated with poetry.
Though Bragi acts aloof, he possesses great passion and enthusiasm. He often asks Xehanort for his opinion on various matters, whether out of respect or to gauge his intent.
As Bragi is secretly a vessel of Luxu, he shares certain characteristics with the Lost Master. In his showdown with Baldr, Bragi has the same aloof cockiness as Luxu's next vessel, Braig (and by extension, his Nobody, Xigbar), including their signature phrase "As if!".
Like his classmates, Bragi wields the Keyblade. In battle, he specializes in defense and focuses on defending his allies.