DJ - 88 DJ - 88 , or Dee - Jay , was a third - degree droid affiliated with the old Jedi Order . A white , humanoid droid with red photoreceptors , DJ - 88 was designed by its Jedi creator to protect the Lost City of the Jedi , a secret library and terraforming station located deep below the surface of Yavin 4 . When the infant Ken was brought to the Lost City by a brown - robed Jedi Master , DJ - 88 became his tutor . The ancient droid acted as a surrogate father to the young Jedi Prince , until Ken encountered Luke Skywalker and became the youngest member of the Alliance to Restore the Republic in 5 ABY . DJ - 88 ' s " life " ended the same year , when the pseudo - Kadann , an agent of the Galactic Empire posing as the Supreme Prophet of the Dark Side , raided the Lost City and ordered the deactivation of the old droid . Biography . Caretaker of the Lost City . After the end of the Great Sith War , the fourth moon of Yavin Prime bore the scars of a terrible orbital attack by the Jedi Order . The Jedi , wishing to repair the damage done to Yavin 4 ' s environment , established an underground city , the function of which was to restore the moon ' s ecosystem . When all the Jedi Knights left the city for good , the library and weather station were entrusted to the good care of droids . This location , now known as the Lost City of the Jedi , was run entirely by artificial intelligence for millennia , with older droids building newer ones as they aged . A few years before the start of the Galactic Civil War , the already ancient but powerful DJ - 88 was in charge of the Lost City of the Jedi , serving both as caretaker and teacher . At some point , an unidentified Jedi Master concealed behind brown robes reached the fourth moon of Yavin , bringing the infant Ken with him . Ken was the baby son of Triclops , Emperor Palpatine ' s own offspring , and the Jedi Princess Kendalina , who had been killed by the Galactic Empire . DJ - 88 was instructed to raise Ken and educate him . The chief caretaker droid fulfilled his mandate conscientiously , teaching the young boy ecology , astronomy , computers , and about fifteen other subjects . For about twelve years , DJ - 88 educated and protected Ken the best way he could , in hopes that the boy ' s Jedi heritage could win out over the dark side that was also a part of his heritage . The white droid chose not to reveal the terrible truth to his pupil , as knowing he was the grandson of Emperor Palpatine would have have left him with irreparable trauma . The secrets of Ken ' s origins had to be kept until the prince became a grown man — old enough to face the truth . Protecting the Jedi Prince . In 5 BBY , DJ - 88 ' s protégé broke the rules and ventured at the surface of the moon . The droid found Ken discussing with Luke Skywalker , a modern - day Jedi and hero of the Rebel Alliance . DJ - 88 knew of Skywalker , but the droid didn ' t immediately agreed to let Ken go with him , despite the boy ' s eagerness to join the Alliance . The caretaker robot raised his hands and filled the air with a blinding smoke , which allowed him to take the Prince back to the city unnoticed . Some time later , Ken once more escaped , hitting the Topworld during an Imperial attack which was burning the forests to the ground . DJ - 88 went to the rescue of his pupil , and he encountered the heroes of the Rebellion . Now properly introduced , Skywalker and DJ - 88 decided to work together in hopes of putting an end to the fires . When the battle was over , the old droid admitted it was time for Ken to explore the wider galaxy , and allowed Luke Skywalker to take the child with him . However , Skywalker and Ken were captured by stormtroopers while on a quest in the mushroom forests of Arzid . They were taken to the members of the Church of the Dark Side , a sham religion supposedly made up of the Prophets of the Dark Side . Their leader , a Bimm impersonator posing as the Supreme Prophet Kadann , planned to steal the ancient knowledge of the Jedi that was contained in the Lost City ’ s library , and tempted the young Jedi Prince into revealing the location of the Lost City of the Jedi . Eager to learn about his origins , Ken betrayed his city and brought the Prophets to it . When the droid DJ - 88 saw the Imperials storming the library , he asked Ken about the motivation of his betrayal . As all seemed lost , the caretaker droid decided the time had come to tell the truth . DJ - 88 revealed the Jedi Prince ’ s frightful origin story in considerable detail . Not wanting to believe it , Ken started crying , pounding on Dee - Jay ' s chest . The old droid tried to console his pupil , and the Kadann impersonator then ordered to deactivate the caretaker droid . An Imperial agent swiftly reacted , opening a panel in the old droid ’ s back and deactivating him . DJ - 88 stood silent and motionless . Characteristics . A third - degree droid , DJ - 88 belonged to the most advanced class of droids ever invented . A towering robot , the caretaker had a white plating and vaguely looked a stormtrooper from a distance . It had a strong , dignified face complete with a metallic beard - like appendage and radiant red photoreceptors that shone like rubies . DJ - 88 lacked any offensive equipment , but he could raise his hands and release a foggy white smoke from his fingertips . This blinding mist was used as a means of defense against enemies , as a screening device to cover the droid ' s movements .