She is the character that Ganon meant to kidnap with the Helmaroc King, instead of Aryll. Her mother died few years before the events of The Wind Waker, and she was left to lead the group of pirates (the only ones actually appearing in the game). Tetra is a sarcastic pirate who (reluctantly) starts Link out on his journey. There is a far bigger emphasis on Link's facial expressions in this game than in previous titles.

Early in his adventure Link obtains the 'Wind Waker', a conductor's baton which can control the winds, and receives the title of Hero of Winds before his final confrontation with Ganondorf.

When his sister Aryll is kidnapped by a large bird, the Helmaroc King, he is forced to come forth and become a hero himself, like his predecessor the Hero of Time, and soon finds much, much more is at stake than just his sister. In The Wind Waker, Link is a boy living in a village on an island called Outset Island, who dresses as the Hero of Time of ancient legends (the Link from Ocarina of Time) for his birthday.

Legend of zelda unknown origins