Tidus is a character in Square Enix's Final Fantasy series and the main protagonist of the 2001 role-playing video game Final Fantasy X. Tidus is a 17-year-old from the city of Zanarkand who is transported to the world of Spira following an attack by the creature Sin. Shortly after his arrival he meets and joins Yuna, a summoner and her guardians in a pilgrimage to kill Sin, after learning the massive creature is his missing father Jecht. He has appeared in other video games, including the Final Fantasy X sequel X-2, the Kingdom Hearts series, and several Square Enix crossover games.

Final Fantasy X is a role-playing video game developed and published by Square as the tenth main entry in the Final Fantasy series. Originally released in 2001 for PlayStation 2, the game was re-released as Final Fantasy X/X-2 HD Remaster for PlayStation 3 and PlayStation Vita in 2013, for PlayStation 4 in 2015, Windows in 2016, and for Nintendo Switch and Xbox One in 2019. The game marks the Final Fantasy series transition from entirely pre-rendered backdrops to fully three-dimensional areas, and is also the first in the series to feature voice acting. Final Fantasy X replaces the Active Time Battle (ATB) system with the "Conditional Turn-Based Battle" (CTB) system, and uses a new leveling system called the "Sphere Grid".