Heartless

The Heartless are the most common enemies of the Kingdom Hearts series: creatures born from the darkness in people's hearts that have no body or soul and seek to consume other hearts. Unless a Keyblade is used to defeat one, the hearts it has stolen pass into the realm of darkness and become Heartless again. When a Heartless is created the body left behind becomes a Nobody, and if both are destroyed the original person is restored. Maleficent's hunt for the seven Princesses of Heart with the forces of darkness made the Heartless a common sight in the realm of light by the time of the first game.