Sheik

Sheik (シーク, Shīku) is the ninja-like alter ego of Zelda in The Legend of Zelda: Ocarina of Time, aiding Link as he adventures through Hyrule to awaken the seven sages. She is playable character in Super Smash Flash and Super Smash Flash 2.

Character description
In Ocarina of Time, after Link pulls the Master Sword from its pedestal, he goes 7 years forward into the future which opens up the Sacred Realm, allowing Ganondorf to take the triforce. Due to Ganondorf's imbalance of wisdom, courage and power, the triforce splits into three parts, leavin Ganon with only the triforce of power. In an attempt to hide her identity, Princess Zelda changes into Sheik to prevent Ganondorf from finding her. 7 years later, Link meets Sheik, a mysterious character who claims to be the last member of the Sheikah; a clan of warriors sworn to protect the Royal Family of Hyrule. Sheik urges Link to find the six sages from the six temples scattered across Hyrule in order to put a stop to Ganondorf. After Link rescues all six sages, he goes back to the Temple of Time where Sheik soon reveals herself to be Princess Zelda.

In Super Smash Flash
Sheik is a playable character in the original Super Smash Flash and conforms a 2-in-1 character alongside, who can transform interchangeably via her down attack.

In Super Smash Flash 2
Sheik is a playable starter character along with and her counterpart. She can transform into Zelda via her down special or be selected from the character select menu. Her moves are directly taken from Super Smash Bros. Brawl. Her sprite design is based on her appearance in Brawl which was based on her planned appearance in The Legend of Zelda: Twilight Princess. She is ranked 8th of A+ tier on the current tier list.