Mickey Mouse

Mickey Mouse is depicted in the Kingdom Hearts series as the king of Disney Castle, frequently referred to in-game as "King Mickey" or simply "the King" (王様, Ōsama). He is also an experienced Keyblade Master, alternatively wielding a golden version of Sora's "Kingdom Key" retrieved from the realm of darkness, and the "Star Seeker" he is seen using during his apprenticeship to Yen Sid in Birth by Sleep. Mickey is absent for most of the original game,[7] which sees him departing his world to discover a solution to the Heartless' invasion, leaving instructions for Donald and Goofy telling to find and protect the Keyblade wielder.[58] He has a more active role fighting alongside Sora and his allies in later installments, which first required the approval of Disney.[11] He is a playable character in Kingdom Hearts II, stepping in to replace Sora whenever the player is defeated during certain boss battles until he is able to revive Sora. He is also available for play in the "Mission Mode" of Kingdom Hearts 358/2 Days as an unlockable character.