sentences:  The three main characters are Terra, Aqua, and Ventus, a trio of Keyblade apprentices under Master Eraqus who aspire to become Masters themselves.Another Keyblade Master, Xehanort, and his apprentice, Vanitas, serve as the game's antagonists.Other characters from the previous games return, such as younger versions of Sora, Riku, and Kairi, though they are given less prominent roles.