Due to to their connection to the original Sith, a Sith Pureblood would be exceedingly rare to see as a Jedi, especially as they had a genetic predisposition toward the dark side of the Force.
Praven was a Sith pureblood male who served the reconstituted Sith Empire as a Sith Lord and later protected the Galactic Republic as a member of the Jedi Order.
Another powerful dark side user during the Sith Empire was Kel'eth Ur. He studied as a Sith until he adopted the Jedi's philosophy of the pursuit of peace, realizing that Sith were ruled by fear. Ur then turned from the dark side and learned the ways of the light, imparting his knowledge to others.
By 44 ABY, the true Sith species in the Empire were believed to have gone extinct due to the interbreeding process. Characteristics shown would be determined depending on how much Dark Jedi or Sith blood an individual possessed due to interbreeding.
Biology. The Human species was able to interbreed with the Coynite, Echani, Ferroan, Hamadryas, Kiffar, Miraluka, Nagai, Sith, Theelin, Twi'lek, and a number of other species.
The ONLY Sith Pureblood That Became a Jedi - Star Wars Explained
How did Sith Purebloods go extinct?
By 44 ABY, it was widely believed that the true Sith species had become extinct due to extensive interbreeding. The characteristics exhibited by individuals were contingent upon the extent of Dark Jedi or Sith blood resulting from interbreeding.
Though the Jedi had strict laws forbidding marriage and family, some still managed to have children; however, children of Sith are seemingly rare, given that they're not highlighted in canon. While Palpatine's situation is uncommon in Star Wars, it's not completely unlikely.
History. A dark side warrior with a mysterious past, Kylo Ren was neither Jedi nor Sith, but a product of both sides' teachings. Once an apprentice of Luke Skywalker's, he killed his fellow students and drove Skywalker into exile, becoming a First Order warlord and servant of Supreme Leader Snoke.
Star Wars Confirms Yoda Turned to the Dark Side - and Almost Became the Most Powerful Sith Lord. With the aid of Count Dooku, Yoda could have potentially destroyed the universe if he had gone to the dark side in Star Wars.
Yoda was one of the wisest masters of the Jedi Order, yet even he was tempted by the dark side. If he had joined the ranks of the Sith, the events of Star Wars would have played out very differently. He could have toppled Palpatine's reign and claimed the Empire for himself.
Legend had it that Yoda—a Jedi who became Grand Master—was trained by N'Kata Del Gormo. A Force-sensitive Hysalrian, N'Kata Del Gormo was trained in the ways of the Force and achieved the rank of Master within the Jedi Order.
Darth Revan is unique, however, because he is the only Sith Lord known to have used a purple lightsaber. Only a handful of canon Jedi have wielded purple lightsabers, but they were much more common in the old Expanded Universe.
After his reincarnation, Darth Sidious aka Palpatine used a blue-bladed lightsaber when he fought Luke onboard his Super Star Destroyer Eclipse. Ultimately, Sith who wielded colors other than red were usually looking to disguise their dark affiliations.
The late Master's legacy suggests that he may have actually been a Sith working against the Jedi Order all along, successfully orchestrating the downfall of the Jedi and the rise of the Empire.
Sith Lords often have yellow eyes in Star Wars, but what exactly causes them and why Count Dooku never had them is a mystery. Emperor Palpatine was the first Star Wars character to have yellow eyes in 1980's The Empire Strikes Back, a look that carried over to Return of the Jedi.
The most notable Sith to wear a mask was the infamous Revan. After defeating the Mandalorians at Malachor V, he disappeared and fell under the influence of the Sith Emperor Darth Vitiate. He waged war against the Jedi before he was eventually redeemed.
Despite his origins, Snoke was not a Sith, but was used as a tool by them to groom and mold Ben Solo, the eventual Kylo Ren, into an heir worthy of Darth Vader's legacy, testing his capacity to inherit the Sith legacy as a whole and rule the galaxy as the new Emperor.
Rey Skywalker, known only as Rey throughout the First Order-Resistance War, was a human female Jedi Master who fought on the side of the Resistance during the war. A former scavenger from the planet Jakku, her life was changed by the tumultuous events of the last days of the New Republic Era.
Count Dooku was a menacing Sith Lord and central figure in the Clone Wars. Once a Jedi -- trained by Yoda -- he became disillusioned with the Jedi Order and thirsted for greater power.
At some point prior to the end of the Clone Wars, the anti-Sith bill was somehow nullified, and the Galactic Constitution which shaped the Republic was made to include a provision that specifically prohibited persecution based on religious or philosophical backgrounds—which included the practices of the Sith.
The Revenge Of The Sith Novelization Hints The Sith Are Not Illegal. Conversely, the film's novelization raised the idea that within the rules of Republic law, Windu actually can't arrest Palpatine for being a Sith.
One of the first, of many, unwritten rules just about every Sith follows is not to love. Love is seen as a weakness by the Sith and can led to a member of the Sith making decisions that no longer help promote the Sith Order but rather the Sith himself.
