Mickey Mouse, often referred to as King Mickey, The King, His Highness, Your Highness, or more commonly as Your Majesty, is the king of Disney Castle, a recurring character, and, along with Donald and Goofy, the main Disney protagonist in the Kingdom Hearts series. He travels the worlds battling the forces of darkness and is a Keyblade Master, and the chosen Keyblade wielder for the Realm of Darkness, though he follows the path of light. Originally believing that the darkness had to be eliminated, he eventually realized that light and darkness are interdependent and cannot exist without the other due to his encounters with Riku.