The Master of Masters
マスター・オブ・マスター
The Master of Masters, also known simply as the Master, is a Keyblade Master who appears in Kingdom Hearts χ. Gifted with the power of foresight, he writes the Book of Prophecies and trains six apprentices: Ira, Aced, Invi, Gula, Ava, and Luxu.
Knowing he will soon disappear from the world, the Master of Masters gives new names to his six apprentices. He also bestows a copy of his Book of Prophecies upon five of them and assigns a unique role to each.
He is immensely intelligent, as he is able to create new entities such as the Chirithy.
To his sixth apprentice, Luxu, the Master of Masters grants his Keyblade and a mysterious box that says “χ Super” on it.