is a series of crossover action role-playing games developed and published by Square Enix (originally by Square). It is a collaboration between Square Enix and Disney Interactive Studios, and is under the direction of Tetsuya Nomura, a longtime Square Enix character designer. Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. The series centers on the main character Sora and his search for his friends and encounters with Disney, Final Fantasy, and The World Ends with You characters on their worlds.