Yuna is a fictional summoner in the Final Fantasy series, and the female protagonist of Final Fantasy X and the sequel Final Fantasy X-2. She was designed by Tetsuya Nomura, and voiced by Hedy Burress and Mayuko Aoki in the English and Japanese versions respectively. She has received mixed reactions for her role in both Final Fantasy X and X-2.

She ranked 10th on IGN's top 25 Final Fantasy characters list. After appearing in a conservative, long dress in Final Fantasy X, the designers changed her outfit to a more revealing one to reflect the more carefree world of Final Fantasy X-2. This was met with both praise and criticism, the latter in part due to the negative influence it has on teenage girls.

The fan reaction to Final Fantasy X convinced the developers to continue the story of Yuna and other characters with Final Fantasy X-2. Tetsu Tsukamoto, costume designer for Final Fantasy X-2, states that the radical design changes for Yuna from one game to the other reflect a huge cultural change. Yoshinori Kitase, producer of Final Fantasy X-2, added that they did not want to make X-2 feel like an extension of its predecessor, so they changed the clothing of Yuna, Rikku, and others' to make them seem more active. This was accomplished before the story and setting were created. Because Yuna, Rikku, and Paine live in a more care-free world, the designers wanted them to be able to dress up, a feature which became key to the game's gameplay. Kazushige Nojima, scriptwriter for X-2, described her new outfit as a "natural reaction to the heavy stuff she wore in FFX". Yuna's singing performance was used to demonstrate the pop feel that X-2 incorporates.

Appearances
Final Fantasy X's system has her use healing magic in the game, while also allowing her to summon powerful magical entities called "aeons." Already known throughout Spira as the daughter of High Summoner Braska – the man who, ten years earlier, brought a brief respite from Sin's destruction (The Calm) – Yuna has chosen to embark on the summoner's pilgrimage to become a High Summoner herself. The burden of this responsibility is expected to see Yuna journey to temples across Spira, acquire the aeon from each and ultimately summon the Final Aeon in a battle that will claim both its life and hers. Her weapons are a variety of staves, and she is able to summon ten aeons during the game. As Yuna's story progresses she gradually becomes more open and falls in love with Tidus. Because Yuna's mother was an Al Bhed she has heterochromia, so one of her eyes is green and the other blue, a reflection of her mixed heritage. Despite this, she is never heard fluently speaking the language (give or take a few phrases), probably due to the fact that her mother died at sea by Sin when she was at an early age. Yuna returns in Final Fantasy X-2 (set two years after Final Fantasy X) as the lead protagonist, and is now nineteen, prominently featured as a Gunner. In X-2, Yuna journeys Spira in search of truth (and hopefully a long lost friend). She is more outgoing but also nostalgic. She is deeply saddened by the fading of Macalania Woods and greatly offended by the exploitation of Zanarkand Ruins as a tourist attraction. She also has a very helpful and generous personality. She always helps people in need, although her job as a sphere hunter may make her intentions seem more money focussed.

In other media
A 'chibi' version of Yuna is seen in Kingdom Hearts 2 where she, Paine, and Rikku are pixies that enjoy treasure hunting.

Reception and promotion
Yuna has received mixed reception for her appearances in Final Fantasy X and X-2. In 2001, Game Informer voted Yuna's relationship with male protagonist Tidus as the best relationship of 2001. Game Chronicles editor Jason Porter praised her realistic appearance, commenting that "you could walk down a street in Tokyo and see her looking in shop windows". In an Oricon poll from 2008, Yuna was voted as the 10th most popular video game character. Jen of Four Fat Chicks criticized her for her poor facial expressions, stating that she rarely cracks a smile, and when she does it seems fake. Netjak editor Clayton Chan criticized Yuna and other characters' super sweet peppy attitude, stating that it was enough to force him to turn off the game at times. Voice actor Hedy Buress has received mostly positive reception for her portrayal of Yuna, specifically in Final Fantasy X-2. IGN editor Jeremy Durham stated that Burress' portrayal of her in Final Fantasy X-2 seemed more comfortable than in the predecessor. GameSpot editor Brad Shoemaker stated that while her portrayal of Yuna in Final Fantasy X was dull and somber, her portrayal in X-2 brought her fully to life in accordance with the other changes to the character. GameSpy editor described her portrayal of Yuna in X-2 as superb.

Yuna's design change in Final Fantasy X-2 has been met with mixed reactions. She ranked 10th on the top 25 list of Final Fantasy characters by IGN. Editors state that while she was good eye candy, calling her sending scene "one of the best in Square Visual Works history", she did not stand out until she got her own leading role, adding that it gave her a "little more confidence, a little more attitude, and yes, it must be said, a gratuitously exploitative costume that ranks among the series' finest bits of fanboy-baiting". IGN editor Jeremy Dunham praised the clothing designs, which he states combine "proven and recognizable Final Fantasy styles" with a "revealing neo-modern fashion sense", referencing her warrior costume as a stand-out. In authors Sharon Lamb and Lyn Mikel Brown's book "Packaging Girlhood: Rescuing Our Daughters from Marketers' Schemes", they describe Yuna's appearance as being a "sexy MTV video star", adding that it's a "lesson to girls that being brave, strong, and ready to fight can only last so long - the next adventure is fashion, boyfriends, and sex". The pop music introduction to Final Fantasy X-2 was also met with mixed reactions. IGN staff stated that it fit the trailer well despite seeming out of place in a Final Fantasy game. Clayton Chan stated that this scene was the point in the game where players would decide to stick with the game or turn it off. Klepek criticized the scene, stating that it brought a feeling of dread after he viewed it.

She has been compared to other fictional characters, including the member of Charlie's Angels portrayed by Cameron Diaz by GameCritics editor Jason Karney and by Gaming Age editor Patrick Klepek. She has also been compared to Tomb Raider star Lara Croft, due both to her attire and gun-wielding skills.