Sith Training Droid Sith Training Droids were a part of an advanced series of holodroids based on the design of the prototype unit known as PROXY . Constructed on the vast ocean - covered world of Kamino , the training droids were primarily used as instruments in a secret project conducted under the surveillance of the Sith Lord Darth Vader . Following the redemption and death of his former apprentice , Galen Marek , Vader was determined to create a " new Starkiller " by utilizing the experimental advanced cloning process . In order to ensure that the perfect clone would learn in a matter of months what took Marek years to learn as an apprentice , part of the overall process included using the training droids to help the clone in developing his inherent skills with a lightsaber . The other purpose for the droids was through their built - in holographic technology . By mimicking the appearances of several individuals who were close to Marek before his death , the clone would have to overcome the psychological side - effects of his genetic template ' s imprinted memories . But due to the initial imperfections in the cloning procedure , as well as the natural complications in cloning a Force - wielder at an over - accelerated rate , many clones resulted in abject failures . Thus , Vader was forced to repeat the procedure over and over again until the flaws could be eliminated , thereby enabling him to finally engineer a genetically perfect replica of the original Starkiller . As a result , the training droids were required to test many clones of Marek , all of which resulted as failures , save one that succeeded in rising above all of his precursors to reach the expectations and approval of Darth Vader . The training droids would later be used for a different purpose when a Rebel Fleet attacked Imperial forces in the conflict known as the Assault on Kamino . As a renegade clone of Marek followed the rebels in assaulting Kamino , the training droids became part of the Imperial defense on the Timira City Cloning Facility . Characteristics . In physical appearance , the Sith Training Droids slightly resembled their progenitor PROXY . Although they were designed in a thin - skeletal frame , unlike PROXY the training droids ' wiring were concealed by metal platings . Another similar characteristic that the droids shared with their " ancestor " was the holographic technology that enabled them to mimic the appearance and voice of virtually any humanoid life form . Their combat programming included the knowledge of marksmanship with blasters and basic lightsaber combat techniques . History . The Sith training droids were based on the design of a holodroid prototype known as PROXY , and thus they possessed the same holographic capabilities and advanced combat programming . Hence , they were able to convincingly imitate all manner of foes , from Rebel infantry to Jedi Knights , in both appearance and fighting style . The droids were located on the Imperial world of Kamino , and there they played an essential role in the cloning facility of Timira City where the Sith Lord Darth Vader conducted a top - secret experiment to create a perfect clone of his late apprentice Galen Marek . The various flaws in the cloning process , however , caused the Sith Lord to resort in creating multiple clones of Marek , thereby gradually eliminating the factors that resulted in the growth of highly unstable clones . As a result of constantly repeating the procedure , the droids were frequently sparring with the more stable versions that were deemed worthy enough for training . It was Vader ' s desire to ensure that the clone who ultimately replaced his original apprentice would not only be just as effective in battle as Marek ever was , but far greater as well . Through the imprinted memories of their genetic template , many of the clones not only learned Juyo , Soresu or Marek ' s unorthodox style of Shien , but also the fighting styles of Ataru and Niman . By having many of the clones wield dual - lightsabers in order to master the arts of Jar ' Kai , Darth Vader intended that his new apprentice would be an even deadlier and more destructive combatant than Marek ever was in his lifetime . Thus , half of the purpose behind the Sith training droids was in the development of the clones ' fighting styles and Force techniques . The other half of their purpose was through the droids ' holographic abilities . To determine the mental stability of the clones and their readiness to detach from the imprinted emotions left behind by Marek , the droids would regularly assume numerous different forms , from average soldiers of the Rebel Alliance to the few individuals who deeply affected Marek prior to his passing . This part of the experiment proved to be the most troublesome with the more stabilized clones . Although Vader came increasingly closer to a fully stable version , he was forced to go through a series of clones that could not fulfill their training by striking down the droids disguised as those who Marek knew or cared about . Some clones refused to attack their progenitor ' s father while others could not bare to attack the young boy that Marek had been prior to his abduction by Vader from Kashyyyk . At least one of the more stable clones absolutely refused to strike down a droid that was not disguised at all . To the surprise of Timira City ' s lead cloning technician , the clone had no emotional - based difficulty at all when it came to destroying the droids that were disguised as Humans , but became distraught with emotion over a single droid that had short - circuited and was thus unable to utilize its holographic technology . The clone refused to attack the damaged droid , and then smiled and repeated the word " proxy " over and over again , thus clearly showing that he had become destabilized over the imprinted memories of Marek ' s friendship with the droid PROXY , whom he believed to be deactivated before his own death . Although its holographic abilities were inaccessible , the droid ' s combat programming was still operating efficiently and proceeded to brutally attack the mentally - unstable clone , who was too overcome by Marek ' s fondness for PROXY to defend himself . Starkiller . Just as Darth Vader believed that he was finally on the verge of success , he had to make certain that he was not wrong first . Having been impressed enough by one clone in particular , he decided that another test was required to make sure that the clone would not fail like those that came before him due to the undermining factor of Marek ' s emotional sentimentality . He declared that Marek was weakened by his emotions and in order to succeed where the original apprentice failed , the clone would have to be strong enough to hate what Marek loved and to be willing to destroy what he created . Hence , several Sith training droids appeared and began disguising themselves as Rebel soldiers . presenting the clone with two red - bladed lightsabers , Vader commanded that the training session commence immediately . Like many of his failed brothers , Starkiller had no difficulty in destroying droids that attacked him . As he continued to effortlessly annihilate his opponents , he felt little to no sentiments over the droids that were disguised as soldiers of the Rebellion . As a clone , he understood that the Alliance was not " his " creation , but rather that of a man whom he was created from . The clone was also determined to serve Darth Vader by proving himself worthy to be the Dark Lord ' s Sith apprentice and was not about to let an obstacle like training droids prevent him from accomplishing his ultimate goal . But like many of the clones before him , he too was stopped by certain memories and emotions that one droid was able to bring to the surface . The clone recognized the droid in the form of a beautiful woman who seemed increasingly familiar to him . Staying his blades at the last possible moment , he finally recognized her as Captain Juno Eclipse , the former Imperial pilot that Marek fell in love with . As a result , the original apprentice ' s emotional attachment to Eclipse almost immediately seized control of the clone , thus preventing him from being able to strike her down . Although he knew that " she " was just a droid and not the real Juno , the clone understood that the test was purely symbolic : striking it down would mean severing himself completely from the feelings that belonged to his genetic template . Although he tried with great effort to follow his Master ' s order , Marek ' s love for Juno caused him to lower his head in defeat and deactivate his lightsabers in failure — much to Vader ' s disappointment . Having proven himself to be just another failure , the clone narrowly escaped death at Vader ' s hands . Overcome by Galen Marek ' s feelings for Juno , the clone succeeded in escaping from Kamino in order to set out on a journey to find the woman who had become the sole focus of his entire existence . Circumstances later forced the clone , by then known by Marek ' s former codename " " Starkiller " " , to return to Kamino where the training droids would fight once more with the rogue clone . The Dark Apprentice . Unknown to the clone who went rogue and escaped from Kamino , Darth Vader was well on the way to perfecting the cloning process . At some point between the creation of various failed clones ( including Starkiller ) and the Assault on Kamino , the Dark Lord had been occupied with personally overseeing the development of the only perfect clone of the original Starkiller . Early in the latest clone ' s training , he was tested against the Sith training droids . Although he succeeded in destroying them , he was nevertheless troubled by the imprinted memories that were used to train him in his inherited abilities . Vader , all too aware of the side - effects and the constant failures that they produced , complimented the clone on his skills but also warned that they came with Marek ' s weaknesses as well . Although Vader ' s approval of the clone steadily grew in a short amount of time , one disappointment after another taught him to be cautious as many clones progressed far , only to fail in the end . But as the clone pressed on with a determination to avoid the fate of his brothers , Vader came to see that his experiment was nearly reaching success at last . As a final test for the clone to prove once and for all that Galen Marek ' s memories and emotions no longer hindered him , the clone was ordered to strike down a training droid disguised as Juno Eclipse . Like his renegade brother , the clone was initially affected by his progenitor ' s memories of Juno , and thus Vader needed to know if the clone would also turn out to be a failure because of Marek ' s love for the former Imperial Captain . But unlike his imperfect counterpart , the latest and most perfected clone proved himself to be the only stable version who could not be controlled by the feelings of Vader ' s deceased apprentice . In striking down the disguised droid , he had severed what little emotional imprints remained within him and thus proved himself to be the worthy disciple that Vader painstakingly endeavored to create . In effect , the program of the Sith training droids was also fulfilled with the virtual completion of the " Dark Apprentice ' s " trials . But their usefulness to Vader would not end there , as seen in the conflict that would erupt on Kamino shortly after the success of the dark clone . The Battle of Kamino . When Juno Eclipse was abducted and transported to Kamino , Starkiller returned to his homeworld and infiltrated Timira City while Alliance forces engaged the Imperials in battle . As the clone ascended further to the top of the cloning facility , he was confronted by Darth Vader and several Sith Training Droids . Declaring that the clone would either return to the Dark Lord ' s service or die in the very place where he was created , Starkiller made his choice and prepared to fight his former Master and the training droids . Relying more on evasive tactics to stall and tire out the clone rather than engage in a direct approach , Vader stood back while the training droids assumed the appearances of various individuals from Galen Marek ' s past . The distraction was not successful the second time around . Starkiller had centered his mind on rescuing Juno at any cost and did not hesitate to strike down the disguised droids . Dispatching the machines with little effort , Starkiller directly confronted Vader , only to discover that the " Dark Lord " was just another training droid in disguise . With the last of the droids destroyed , Starkiller ascended further up the facility to confront the " real " Darth Vader . During the fighting in Timira City , PROXY took notice of the scattered remains of the Sith Training Droids that had been destroyed in the wake of Starkiller ' s rampage in the cloning facility ' s spire . After the Alliance forces defeated the remaining Imperials and captured Darth Vader himself , PROXY approached Juno Eclipse and asked for permission to salvage the droids ' components . He realized that they were modeled after his design and calculated that their pieces could be used to not only repair his heavily damaged body , but could also restore his primary programming as well . Though technically a droid devoid of Human emotion , Juno could see that PROXY was quite anxious to have the opportunity to rebuild himself back to his former state . Seeing no significant reason to reject the droid ' s request , Juno acquiesced to PROXY ' s request but urged him to do so with haste . Elated , PROXY wasted no time in hurrying to collect the components that he required from the training droids .