Kreia
this woman was a Jedi Master during the years following the Great Sith War. She had an uncanny knack for tapping into the Force, and could teach students new ways to communicate with the Force. Although she was loyal to the Jedi Order, Kreia wielded a double-bladed lightsaber, which employed green crystals. About five years after the defeat of Darth Malak, Kreia discovered The Exile onboard the damaged starship Ebon Hawk and brought it to Peragus II. After making sure that The Exile was able to escape, Kreia found herself confronting Darth Sion, in order to ensure The Exile's escape. She barely managed to survive the encounter, in which she lost the use of one hand, and made her way back to the Ebon Hawk just as The Exile and Atton Rand were blasting off. She kept to herself during the initial part of their flight, nursing the stump where her hand used to be, until The Exile questioned her about a blinding pain in his hand. Kreia realized that a Force Chain had formed between them, although the reason for the link was unclear. Kreia was also surprised to find that The Exile's connection to the Force had begun to return, and vowed to train him in order to help restore the Jedi Order. It was during this training that Kreia revealed she was one of the many Jedi who abandoned the Order to confront the growing power of the Sith, in the wake of the destruction of the Star Forge. She also revealed that she had been Revan's teacher, both during his early training and again after he returned to the Light Side of the Force. However, after The Exile managed to regroup the surviving Jedi Masters on Dantooine, Kreia revealed that she had fallen to the Dark Side of the Force. Having re-taken the title of Darth Traya, she fled to Telos with Atris and set out to destroy the planet. In the wake of her death on Malachor V, the surviving Jedi were able to piece together enough of Kreia's history to realize that she had been behind a large number of defections - among them, Revan and The Exile - during the years following the Great Sith War. Because of this, she was exiled by the Jedi Order. In her guilt, Kreia chose to abandon the Jedi and seek out Revan on Malachor V. It was there that she began her training at the Trayus Academy, and led to her ultimate fall to the Dark Side and her transformation to Darth Traya.