Unknown (disambiguation)

The terms Unknown (謎の男) or ??? may refer to a number of characters in the Kingdom Hearts series. Additionally, "" is the name of a musical composition featured in Kingdom Hearts Concert -First Breath-.
 * Xemnas in Kingdom Hearts Final Mix.
 * Marluxia in Kingdom Hearts Chain of Memories.
 * Riku in Kingdom Hearts II and Kingdom Hearts 358/2 Days.
 * Xion in Kingdom Hearts 358/2 Days.
 * Data-Roxas in Kingdom Hearts coded.
 * Xehanort in Kingdom Hearts Birth by Sleep and Kingdom Hearts 3D: Dream Drop Distance.
 * The Master of Masters and Luxu in Kingdom Hearts χ.
 * Ephemer and The Master of Masters in Kingdom Hearts III.