Nabooru's Second-in-Command

Nabooru's second-in-command is a character in Ocarina of Time who remains unnamed throughout the game. While Nabooru is away in the Spirit Temple, she leaves her second-in-command in charge of Gerudo Fortress. Whenever Link finds a carpenter in a cell, she will appear to face him in a duel; if Link wins, she will jump into the air and vanish leaving the key to the cell, but if he loses, he will be chucked in jail or thrown out of the fortress if he does not have the Hookshot. After freeing all the carpenters she will compliment Link on accomplishing such a thing and give him the Gerudo Membership Card which allows him to walk about freely in the Gerudo Fortress and access the Haunted Wasteland.

She is the Hyrule counterpart of Aveil.

Trivia
The color of her clothes change to match what Link wears, even during the battle.