Heartless (Kingdom Hearts)

The Kingdom Hearts video game series, developed by Square Enix in collaboration with Disney, is set in a universe consisting of numerous self-contained worlds based on intellectual properties from both companies. Many of these worlds are based on animated Disney movies, though Kingdom Hearts II introduced worlds based on live-action Disney films as well. In addition to the Disney worlds, a number of original worlds appear over the course of the series.

The series centers on the character Sora, a boy who searches for his lost friends and encounters Disney and Final Fantasy characters as he travels between worlds. In the first game, Kingdom Hearts, Sora fights against the villains of the series known as the Heartless and seals each world he visits to prevent their return. In Kingdom Hearts II, Sora helps the residents of these worlds again in search of his friend Riku. The Kingdom Hearts games have been both critically acclaimed and commercially successful and the design of the worlds has been praised for its faithfulness to the source material.

Nomura intended hearts, as well as the strengths and connections of the heart, to be a common theme in the games. Characters within the Kingdom Hearts series are composed of three parts: body, soul, and heart. The body acts as a vessel for the heart and soul, with the soul giving life to the body. The heart holds their memories, and gives them emotion, light, and darkness.

The Kingdom Hearts games are divided into various game levels, referred to as "worlds", which the player progresses through over the course of each game. Worlds vary in appearance, typically dependent on the Disney setting which they are based on. The worlds' graphics resemble the art style from the originating Disney film and the worlds are inhabited by characters from their respective films; for example, Hercules and Philoctetes appear in Olympus Coliseum from Hercules, while Aladdin, Princess Jasmine, and the Genie appear in Agrabah from Aladdin. The game worlds consist of interconnected field maps where battles and plot-related events occur. Players travel between worlds in different ways each game, such as the '"Gummi Ship'" in the original Kingdom Hearts, or via "keyblade glider" in Kingdom Hearts Birth by Sleep, by "Corridors of Darkness" in 358/2 Days, and "Sleeping Keyholes" as well as portals in Dream Drop Distance. Worlds created specifically for the series mirror the overall appearance of the other worlds and predominantly feature characters from Final Fantasy games and original characters.

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