The summoner in Final Fantasy X who is the main character’s love interest is Yuna.
Yuna is a summoner from Spira and the daughter of High Summoner Braska, the hero who defeated Sin ten years before the game begins. She undertakes the traditional pilgrimage to obtain the Final Aeon and defeat Sin, traveling with guardians including Tidus, the game’s protagonist. As the journey develops, Yuna and Tidus form the story’s central romantic relationship.
Yuna’s role is more than that of a love interest. She is the emotional and thematic center of Final Fantasy X, embodying Spira’s religious traditions while gradually questioning the cost of the summoner’s pilgrimage. Her compassion, resolve, and willingness to challenge established beliefs drive the plot toward its major revelations.
The other options are fellow playable characters: Lulu is a black mage and Yuna’s guardian, Rikku is her Al Bhed cousin, and Paine belongs primarily to Final Fantasy X-2. Yuna also returns as a central character in that sequel.