Spira is a fictional world featured in the video game series Final Fantasy. It is known for its lush landscapes, diverse cultures, and a unique blend of technology and magic. The inhabitants of Spira face the constant threat of a monstrous entity called Sin, which brings destruction and chaos to their lives. The story of Spira revolves around the journey of a group of characters, including Tidus and Yuna, as they seek to defeat Sin and bring peace to their world. Throughout their adventure, they explore various regions, encounter different races, and uncover the history and mysteries of Spira.