Sheik

Sheik is a character in Ocarina of Time, and is an alter ego of Zelda. In the game, Zelda passes herself off as a young Sheikah known as Sheik. With voice muffled and face concealed, as well as wearing a form-fitting blue suit, black boots with the red Sheikah eye in the center, the character is essentially unrecognizable as Zelda.

Sheik plays the harp and teaches Link new songs to help him on his quest. When Link arrives at the Temple of Time near the end of the game, Sheik uses the Triforce of Wisdom and reverts to Zelda. It is claimed by the character's trophy in Super Smash Bros. Melee that Zelda uses her magical skills to change her skin tone, hair length, eye color, and clothing. However, when Link encounters Princess Ruto in the Water Temple, she refers to Sheik as "a man", and in the non-canon licensed manga for Ocarina of Time it says that Zelda used the Triforce of Wisdom to actually become male while disguised as Sheik, and sealed away the consciousness of Zelda.

Sheik appears in Super Smash Bros. Melee and Super Smash Bros. Brawl, in which Zelda can change into Sheik as one of her abilities. Sheik's new design in Brawl is based on a model created for consideration in Twilight Princess.

Recourses

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