Before Kingdom Hearts χ
According to Chirithy, Luxu was originally one of the six apprentices of his creator, the "Master of Masters". He was assigned his name by the Master, but unlike the others, was not given a tome from the Book of Prophecies. Instead, he was made privy to the secret contents of the Lost Page detailing the intentions of the Master of Masters—intentions that are not concerned with the survival of the world, and instead foretell how the conflict between Unions will eventually erupt in the Keyblade War—and was given the mission the observe these events to ensure that they will occur as prophesied. He disappeared shortly after the Master of Masters did, leading the other Foretellers to believe that he was following the Master and might have information on his whereabouts.
Kingdom Hearts χ
Luxu is mentioned only a few times by Chirithy and the player's foreteller.Template:Section-stub
In order to complete the mission given by the Master of Masters, even if it means taking centuries to attain, Luxu's heart left his original body, moving into different vessels throughout time. He currently takes the form of Xigbar, Braig's nobody. Retrieving his former keyblade, he calls the other Union leaders, except for Ava as he assigned her a task different from the others.
Luxu is a man wearing a black coat.
His name is derived from the Latin word "luxuria", or Lust, which is symbolized by a scorpion in the Ancrene Wisse.
Though not much is known about his level of strength, it is implied to be on par with that of the other keyblade masters (i.e. Ava). He is shown to be able to least fight with a keyblade and has some strength as well, being able to move heavy objects like the box.Template:Section-stub