Cephiro is a fictional world featured in the anime and manga series Magic Knight Rayearth, created by CLAMP. It is a magical realm where the balance of power is maintained by the Princess Emeraude, who is kidnapped, prompting three girls from Japan to become the legendary Magic Knights and rescue her. The landscape of Cephiro is diverse, featuring lush forests, vast deserts, and towering mountains. The inhabitants possess varying degrees of magical abilities, and the world operates under the principle that the strength of one's will can shape reality. This unique aspect of Cephiro plays a crucial role in the story's development.