Yuna is the deuteragonist of Final Fantasy X and the main protagonist of its sequel, Final Fantasy X-2. She is the daughter of High Summoner Braska and an unnamed Al Bhed woman, who died when Sin attacked her ship at sea. Yuna's mother was the sister of the Al Bhed leader Cid, who is Yuna's uncle and the father of Rikku and Brother, Yuna's cousins.

In Final Fantasy X, Yuna becomes a summoner like her father before her, and embarks on a pilgrimage to expel Sin. She meets Tidus who teaches her there is more to life than sacrifice.Yuna is a kind-hearted, loyal, honest, and polite humanitarian who strives to see the best in others and has a strong conviction to complete whatever task she feels is her duty. She is naive, always believing the best of people, and often places the needs of others above her own. Like most summoners, Yuna is a devout follower of Yevon's teachings. She hides her feelings of fear and sadness while encouraging her friends to express themselves in her place.

Two years later Yuna has undergone a transformation with a new revealing dress style and a more adventurous personality. Yuna's attire changes for each of the dresspheres, with details that distinguish her from Rikku and Paine. Yuna's default appearance is the Gunner dressphere, an outfit given to her by Rikku in Final Fantasy X: Eternal Calm. Freed from her responsibilities as a summoner, Yuna has a new lease on life. Though still unflinchingly polite, soft-spoken, and driven, she is now athletic, cosmopolitan, outspoken, and playful. Yuna has developed a go-getter attitude, willing to jump headfirst into danger but also considers to resolve issues without resorting to violence. She has learned to think and desire for herself.

Yuna has heterochromia: her left eye is blue, while the right is green to represent her half-Al Bhed heritage, though without the characteristic spiral. (More...)

Design for the Emperor of Hell for Theatrhythm Final Fantasy: Curtain Call. When The Emperor is killed by Firion and his allies, his soul conquers Hell and returns to the world of the living to finish his conquest of it as well. Raising Pandaemonium, the palace of Hell, where Palamecia once stood, the Emperor of Hell acts as the final boss of the game.

In the original NES release, the Emperor of Hell was only shown with his shoulders and arms visible below his head. Later re-releases of the game and the Emperor's appearance in Dissidia Final Fantasy grant his Emperor of Hell form a full body. This Curtain Call design harkens back to the NES sprite rather than the remakes. This design is also used in Final Fantasy All the Bravest.