Luxu

Luxu is a Keyblade Master who appears in Kingdom Hearts χ. He is the sixth apprentice of the Master of Masters.

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 to 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 Back Cover
Prior to the conflict between the Unions, the Master of Masters discussed Luxu's role in the upcoming conflict. Summoning Master Xehanort's Keyblade, the Master of Masters gives Luxu the Keyblade to use to help him in the future.

Luxu asked the Master of Masters what the purpose of the Gazing Eye was. He replied that the Gazing Eye was, in fact, his own eye, which disgusted Luxu. Replying sarcastically at first, the Master of Masters explained that the Gazing Eye allowed the Master of Masters to see any events from anywhere, including across time. The Master of Masters explained that Luxu was to raise an apprentice and pass this Keyblade down to his apprentice, and task his apprentice with passing down the Keyblade to their own apprentice, and so on. This would allow the Master of Masters to have knowledge of all the events in the future; he signaled that the existence of the Book of Prophecies was proof that Luxu had succeeded, and congratulated him on his success.

However, Luxu wasn't convinced by this explanation, and tried to explain to his master that he hadn't done anything yet. The Master of Masters seemed untroubled by this, and instead insisted that Luxu should get started on his task. The Master of Masters explains to Luxu must go without a copy of the Book of Prophecies, to avoid temporal paradoxes, though he once again assured his apprentice that he would do just fine. He then imparts to Luxu the final part of his role in the upcoming conflict: to leave Daybreak Town, with his Keyblade and a mysterious case, and become a neutral observer of the upcoming conflict. Asking his master what's in the case, Luxu was annoyed when he is told that he can never open it and find out. The Master of Masters relented slightly, and decided to tell Luxu what is in the case; the contents surprised Luxu.

Sometime later, Luxu had dragged the mysterious case across the dusty plains of an unknown world. He briefly paused and, holding his Keyblade, looked up to the sky, and muttered "May my heart be my guiding key".

Kingdom Hearts χ
As the situation between the Unions deteriorates, the Player and Skuld decide to question Foreteller Gula about Foreteller Ava. He informs them that she is searching for the Master of Masters in order to prevent the Keyblade War, and has sought out the sixth apprentice, Luxu, who is the only one with clues to the Master's whereabouts.

Meanwhile, Ava tracks Luxu to the outskirts of Daybreak Town. When questioned by Ava, Luxu explains his mission, then claims that the Keyblade War is unavoidable and that he will set off after the current world ends. Ava accuses him of being the traitor responsible for sowing distrust between the unions, and he brandishes his Keyblade.

Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-
Luxu and the Keyblade observed the final moments of the Keyblade War at the Keyblade Graveyard, granting the Master of Masters knowledge of the event.

Design
Luxu is a man wearing a black coat. His zipper is engraved with a stylized version of the Unversed emblem.

His name is derived from the Latin word "", or Lust, which is symbolized by a scorpion in the .

Abilities
The default form of Luxu's Keyblade is the Master Xehanort's Keyblade, which uses a Gazing Eye charm as its token.