Nabooru

In Ocarina of Time, Nabooru is the amazonian leader of the Gerudo, in a position of authority second only to Ganondorf himself. Behind his back, she works to undermine his evil efforts; she's a thief, sure, but she's no world conquering villain! After some trouble at the Spirit Temple, she winds up captured and controlled by the witches Koume and Kotake, but being rescued by Link reveals her as the Sage of Spirit, and she goes on to help defeat Ganon alongside the other Sages.

Of course, in this version of events, Nabooru shows a lot more than her Spirit as she runs afoul of Ganondorf's minions, the consequences of treasure hunting, or even just simple bad luck! When does it happen, though?