Light Sith

"Master. I have exciting news! A trail of corpses&mdash;all slain the same way as the light side Sith I found&mdash;has led me to the perpetrator. His name is Lord Cendence. He's been secretly hand chosen by the Dark Council to eradicate any and all Sith who are not pure."

- Jaesa Willsaam

There were some adherents of the Sith teachings that, for whatever reason, rejected the dark side of the Force in favor of the light. Nonetheless, these Sith retained their devotion to the Sith as an organization and were called light Sith or light side Sith.

History
During the Cold War a group of light-leaning Sith formed within the ranks of the Sith Empire. The Dark Lord Cendence was hand chosen by the Dark Council to hunt down and destroy any Sith not deemed "pure".

Cold War
"My mission to unite with the light-leaning Sith was... awful. They didn't trust me. They thought I was trying to trick them. The confusion I read in them, the fear, I still feel it. What's worst most of them fled, but a few... they attacked me, and I had to... they forced my hand, Master."

- Jaesa Willsam

During this time, Sith apprentice Jaesa Willsaam was ordered by her Master to track down the renegade Sith. Jaesa succeeded in her mission, but the wary Sith fled, with some going as far to attack the young apprentice, forcing her to kill them in self-defense.

Gravid's purge
"The last Sith possessed of the knowledge had been inexplicably drawn to the light side, and killed, taking the secret process with him."

- Darth Plagueis Centuries later a Sith Lord named Darth Gravid also came to the conclusion that pure devotion to the dark side would curse the Sith of his era to the same fate as their predecessors, and sought a new philosophy in which the Sith would follow the light side of the Force, strengthening themselves with compassion and love, as their Jedi counterparts did. Sealed away in his Jaguada bastion Gravid set about amassing centuries worth of Sith lore that had been passed down from Master to apprentice since the time of Darth Bane, including: holocrons, crystals, scrolls, tomes, amulets and all other manner of artifacts, and proceeded to burn them, seeking to ensure that future generations of aspiring Sith remained committed to the path he had laid before them.

Unfortunately, Gravid's apprentice Darth Gean did not share her Master's vision. Horrified by the destruction of the Sith's treasures she threw herself at her Master, attacking Gravid with her bare hands, and after a violent struggle, succeeded in killing him, bringing an abrupt end to his plans. Although many valuable artifacts and teachings were consigned to the flames, including the coveted technique of essence transferal Gean did manage to preserve enough material with which to instruct her own apprentice, ensuring the continuation of Darth Bane's original intentions: Unfaltering allegiance to the dark side.

Legacy
Darth Plagueis later recounted the events of Darth Gravid's demise in regards to seeking out the lost method of immortality. Likewise, Plagueis would do something similar in spirit to Gravid&mdash;he attempted to end the Rule of Two, only to end up being murdered by his apprentice, Darth Sidious as a consequence, who felt that ending it was against the nature of the dark side.

Behind the scenes
Originally, in Star Wars: The Old Republic all light side Sith the player encounters throughout the game wielded purple-bladed lightsabers. This was due to a gameplay mechanic which allowed the use of red colored crystals to darksiders only. This limitation has since been removed, however.

Appearances

 * Star Wars: The Old Republic
 * Star Wars: Darth Plagueis