Aiolin Astarte Aiolin Astarte was a female human engineered and trained by Doctor Cylo to replace Darth Vader as Darth Sidious ' Sith apprentice . Astarte and her twin brother Morit Astarte were born of the Astarte line of Celanon , who had joined the Separatist cause . The Astarte line funded much of Cylo ' s early work . Cylo thought of them as " generally smart " and " forward facing " . Fearing retribution for their allegiance during the Clone Wars , the Astartes passed their children to Cylo for training and experimentation , in the hope for redeeming themselves . Biography . Early life . Aiolin was born , along with her brother , Morit , into the Astarte line of Celanon either before or during the Clone Wars . His family financially backed the research of Doctor Cylo , a specialist in cybernetics whose experiments were considered immoral and illegal by the Galactic Republic , during this time . The Astartes sided with the Separatists during the war and , fearing the retribution of the new Galactic Empire , they gave their two children over to Cylo ' s care . With backing from the newly self - appointed Galactic Emperor Sheev Palpatine , Cylo continued his research and included Aiolin and Morit into his experiments . He upgraded them with the best genetic enhancements and technolgy that made them stronger and capable of greater feats than common warriors . Such an ability was an ability to slice into technological systems and with little to no ability . Cylo believed that this not only made up for their lack of Force sensitivity , but also eliminated any need for the Force . He also provided the twins with advanced training in lightsaber combat . Coupled with their technological upgrades , including rockets placed in the soles of their feet and missile launchers in their wrists , this turned the Astarte twins into warriors with abilities equaling those of the Jedi and Sith of old . The Arrival of Vader . Several weeks after the Battle of Yavin , Sith Lord Darth Vader learned of her and her brother ' s existence after he captured and killed Cylo , after learning of the doctor ' s existence from the Emperor , Darth Sidious . She was sent along with her brother , Morit , to Sho - Torun to aid Vader in subduing the the Ore - Baron revolt against Queen Trios at Sho - Torun . During the ensuing conflict at Sho - Torun , she gravitated towards Vader as a mentor , wishing he teach her the ways of the Jedi . She hoped Vader would train her to become a better at the lightsaber . Vader was quick to dismiss this , saying nothing he could teach would be useful to her , and telling her that she and her brother had bought a fantasy : Neither of them had any future . Nearing the end of the revolt at the Sho - Torun war , she and her brother Morit tried to ambush Vader , in order to take out one of their competitors in their scheme for who would be the Emperor ' s right hand . However , Vader successfully held them off , and Aiolin told her brother that she was no longer certain they could ever defeat Vader . Morit was however still determined to eliminate " one " of his competitors on that occasion , and in an act of sudden betrayal , he pushed Aiolin off a cliff , making her fall into a pit of molten lava . Before she succumbed to her agonizing wounds , Vader used the Force to raise her from the lava . In an uncharacteristic display of seeming compassion , he assured her that the pain would soon pass , but asked her to tell him everything she knew . The horribly burnt woman revealed that Cylo V had collaborated with the Ore - Barons in the rebellion against Queen Trios and was planning to betray the Emperor Palpatine . Aiolin then thanked Vader in advance for ending her pain , apparently understanding what this really entailed : Vader used his lightsaber to put her quickly out of her misery . Vader ' s somewhat merciful handling of the situation , even though he was dealing with a person who had just tried to kill him , was probably motivated by his own traumatic memory of being maimed and burnt on Mustafar .