Tetra

Tetra is a young female pirate who, in The Wind Waker and The Phantom Hourglass, causes Link to start his journey. Her mother died a few years before the events of The Wind Waker, and she was left to lead the group of pirates. She is the one whom Ganondorf intended the Helmaroc King to kidnap, instead of Aryll. Initially, she does not like Link, unimpressed by his sadness owing to the kidnapping. Later, however, she notices Link wielding the Master Sword as he advances to slay the Helmaroc King.

She periodically helps Link in his quest, and, later, her true identity is revealed in Hyrule Castle: she is Princess Zelda, the last heiress in the Hylian Royal Family bloodline. Before this, Tetra did not know she was Zelda, yet knew of Hyrule, the legend of the Hero of Time, and the Master Sword, and wore a large piece of the Triforce of Wisdom around her neck as a necklace. When reunited with her ancestor, the King of Hyrule, their Triforce pieces unite, triggering her physical transformation into the fair-skinned, blonde Princess Zelda.

Tetra also appears in Tetra's Trackers, a part of the Japanese version of Four Swords Adventures, as well as Phantom Hourglass, where she is taken by the Ghost Ship, from which Link must rescue her. Link then learns that he must also defeat Bellum to restore her from being transformed into stone.

Recourses

http://en.wikipedia.org/wiki/Princess_Zelda#Tetra