Kreia (pronounced /ˈkɹeɪjə/) was an unconventional and highly controversial Force-sensitive Human female exiled Jedi Master who took upon herself to build a new Jedi Order of her vision in freeing sentient beings of the galaxy from being enslaved to the Force. Although Kreia’s desire to gain a full understanding of the essence of the Force made her submit herself to the dark side of the Force and eventually becoming the bitter Sith Lord Darth Traya, (pronounced /tɹeɪjə/) as well as her consolidation of a Sith Order from other fallen Jedi, Kreia was betrayed once more by her own Sith apprentices, leading her to set aside the Force’s dark side and take on a quest of cleansing. The former Darth Traya found the Jedi Exile, a Human female named Meetra Surik, whom Kreia took on as her teacher. Through the Exile, Kreia brought down the Jedi still remaining from the Sith’s purge previously initiated by her, the remnants of her Sith Order, and an emerging Sith—the Jedi Master Atris—before ultimately completing Surik’s training by forcing the exiled Jedi to let her die.
Kreia was a Jedi Master and historian who was exiled by the Jedi High Council because her students followed the Jedi Knight Revan, her former Padawan, to wage war against Mandalorians invading the Galactic Republic. Revan turned the resulting Mandalorian Wars into a series of conversion of Jedi to the dark side, covertly building the foundations of a Sith Empire by overwhelming Jedi Knights with the power of the dark side, which was fuelled by warfare and mass death; the wars culminated in a battle over the Sith world of Malachor V, in which the activation of the Mass Shadow Generator at Jedi General Meetra Surik’s command eliminated nearly all Jedi and Mandalorian combatants; however, due to Surik’s fear, she unconsciously cut herself off from the Force whilst carrying all the deaths and suffering of Malachor with her, becoming a void in the Force. Seeing the death of the Force within Surik, the Jedi Council cast her out of their Order.