Septima Searsha

Septima Searsha was a female human Jedi who lived from 45 BBY to approximately 20 ABY. She was born to two dark Force-users, who were slain by Jedi one year after Septima's birth. 
Discovering they had orphaned a child, the Jedi brought Septima back to the temple on Coruscant to be trained in the ways of the Force, knowing nothing about her parents' dark pasts. Septima was taken on as a padawan by Aayla Secura and served alongside her master in the Clone Wars, specializing in dual-wielding two blue lightsabers. About halfway through the Clone Wars, Septima encountered Count Dooku who informed the young Jedi of the truth about her parents. This brought about the Jedi's brief fall to the Dark Side, however, she was able to find her way back to the light. The Jedi Council held a grueling trial to determine her fate, and Master Yoda overturned the vote to expel Septima from the Order and took it upon himself to teach the young Jedi how to control the darkness within her. She would later become a Knight, and was sent on a special mission to retrieve Jedi artifacts from Tython when Order 66 was executed. Because she brought no clones on the mission, Septima survived and fled to the Outer Rim to avoid the reaches of the Empire. She spent years evading Imperial forces until she joined the Rebel Alliance and served as a general for the rebels. She was a notorious enemy of the Empire and was once captured and survived months of brutal torture until she was rescued by the Rebels; however, after this event Septima was noticeably more dark and cold. Septima was a brutal warrior and a cunning enemy, and used some questionably dark Force techniques to defeat her enemies. She did feel guilt for surviving Order 66 when so many great Jedi had not, and worked to redeem herself by searching the galaxy for young Force users and training them in the ways of the Jedi, eventually building a small temple in the Outer Rim that was a sanctuary for Jedi during Imperial rule.