Queen of Gerudo

Once you defeat the Gerudo's Fortress and free all of the captured carpentors, the woman who appears while you are still in the prison cell of the last carpentor will tell you how she was put in charge of the fortress by the exalted Nabooru, who was second in command to Ganondorf. As it is said in Gerudo legends, one man is born every hundred years, and is destined to become king. Every king needs a queen, and since Nabooru is second in command, this hints that she is queen and might have had some form of an affair before Ganondorf became over run with the idea of ruling Hyrule for himself. She also wears a gem upon her forhead, similiar to Ganondorfs, which is not present on the other women of her rtribe. Her clothes vary as well as she is not a guard at the fortress. Her position as the Sage of Spirit also adds to her position as queen. The other 6 sagees(Zelda included) are all highly ranked figures to their people. Saria is more of a peace maker among the Kokiri, Ruto is princess of the Zora, Darunia is Chief of the Gorons, Impa is the founder of Kakariko Village, Rauru is an anchient sage who is not seen outside of the Light Relam at all but appears to be a precher or minister, at that time having high ranking power. The other sage is Zelda, who obviously is princess of Hyrule. So Nabooru is left and it wouldn't be right for all the sages to be of high power and one lone wolf Gerudo on her own with no authority among her people.