 In "Final Fantasy X", Yuna is introduced as a summoner who can use healing magic and is able to summon powerful magical entities called aeons with help from spirits known as Fayths.Already known throughout Spira as the daughter of High Summoner Braska, who previously brought a brief respite from Sin's destruction ten years earlier, Yuna decides to embark on the summoner's pilgrimage to become a High Summoner herself.Yuna must journey to temples across the world, acquire the aeon from each and summon the Final Aeon in a battle that will kill them both.