"Tidus (ティーダ, Tiida) is the protagonist in the console role-playing game Final Fantasy X. As the lead character, the player controls Tidus through the game, manipulating his actions through the unfolding storyline in traditional Final Fantasy style. Similar to the other characters in Final Fantasy X, Tidus' abilities are built around a classic Final Fantasy job class - in his case a Fighter, a balanced melee class. However, he also features many abilities from the Time Mage class in the form of supportive spells for himself and his group. Tidus is one of three characters able to fight underwater.
The storyline of Final Fantasy X initially revolves around Tidus, a 17-year-old rising Blitzball star player from Zanarkand. After a mysterious creature called "Sin" attacked his hometown, Tidus was seemingly transported to the world of Spira. Lost, confused, and feeling out of place, Tidus soon meets a newly fledged summoner, Yuna, and her guardians. It is here that Yuna becomes the main focus of the story, while Tidus takes on a secondary role. The summoner is soon to set out on a pilgrimage in an attempt to put an end to the very creature that attacked Tidus' city, and by joining them, Tidus hopes he will find his way home. He has also made appearances in other video games, such as Final Fantasy X's sequel Final Fantasy X-2, the Kingdom Hearts series, and Dissidia: Final Fantasy.
Tidus has generally been well-received by video game reviewers, despite being criticized for his voice work and outfit design. Several types of merchandise based on Tidus' character have been produced, such as action figures and jewelry."
Source: Wikipedia, "Tidus", available under the CC-BY-SA License.