Final Fantasy X is set on the watery world of Spira. Spira's civilization was suddenly destroyed by a huge force of nature known as Sin. One thousand years later, humanity has adopted the Ebon religion and lives in fear of technology, never knowing where Sin will strike next. Players control the likes of, Tidus a cheerful sword-slinging youth and a star player at the underwater sport of blitzball, but he has resent towards his father throughout the story. But while Tidus is the main character, the actual star of the story seems to be his staff-wielding love interest Yuna. The daughter of the famous summoner Braska and a summoner herself, Yuna has been haunted by strange dreams as of late. Believing Sin to be the cause, she swears to defeat it, and perhaps emerge from her parents' shadow in the process. Yuna's plan is to journey to each Ebon temple and acquire its resident Aeon (summoned monster); only once she has gathered them all can she hope to defeat Sin. Tidus is simply Yuna's bodyguard and traveling companion on this mission.