EV - A4 - D / Legends EV - A4 - D , also known as A4 - D or Ay - Four - Dee , was an A4 laboratory assistant droid who served the cyborg General Grievous of the Confederacy of Independent Systems as a medical / repair droid during the Clone Wars . As with many EV - model droids , a programming defect caused EV - A4 - D to have a sadistic personality . Prior to his work with Grievous , EV - A4 - D served as a supervisor in a hospital on the world of Tauber , but he was relieved from duty after ordering the medical droids under his command to operate on patients without administering painkillers . He was later purchased by the InterGalactic Banking Clan and absorbed into the Confederacy of Independent Systems . EV - A4 - D was eventually assigned to work as the personal doctor of Grievous . Stationed in Grievous ' s castle on the third moon of Vassek , EV - A4 - D became the facility ' s caretaker , managing the general ' s residence and working to repair any damage he sustained to his cyborg body over the course of the war . In 22 BBY , Confederate Head of State Count Dooku lured Republic forces to Grievous ' s castle in order to assess the general ' s abilities as the Supreme Commander of the Separatist Droid Army . During the confrontation with the Republic , Grievous was heavily damaged and was repaired by EV - A4 - D to be able to confront the intruders once more . EV - A4 - D later separated Nahdar Vebb and Kit Fisto , the two Jedi who were leading the Republic forces , allowing Grievous to defeat Vebb . However , as EV - A4 - D monitored the castle ' s security cameras from the control room , he was decapitated and destroyed by Fisto . The droid ' s body was later recovered by Grievous and reassembled . EV - A4 - D then left Vassek , traveling with his master during his military campaigns serving as both doctor and advisor . EV - A4 - D was present alongside Grievous during the siege of Dorin , during which he informed the general of a communication from Count Dooku ' s assassin , Asajj Ventress . Biography . Hospital service . EV - A4 - D was manufactured by MerenData as part of the first - degree EV - series supervisor droid line . Like most of the EV - series , A4 - D , or Ay - Four - Dee , was affected by a programming defect during production that caused him to have a sadistic and malicious personality . Regardless of the defect , MerenData sold the EV - series droids , and EV - A4 - D became a supervisor to the droids serving as the staff in a hospital on the planet Tauber . EV - A4 - D ' s work in the hospital yielded dramatically higher productivity from the droids ; however , the supervisor droid ' s methods disturbed the Human doctors . After serving in the hospital for a time , EV - A4 - D ordered the droids to operate on the patients without the use of painkillers . As a result , EV - A4 - D was returned to MerenData , only to be later purchased by the InterGalactic Banking Clan . The general ' s doctor . During the Clone Wars , the InterGalactic Banking Clan allied itself with the Confederacy of Independent Systems , a separatist government opposing the Galactic Republic . EV - A4 - D , modified with medical and repair attachments , was assigned to work in the castle of cyborg Confederate General Grievous , Supreme Commander of the Separatist Droid Army , on the third moon of the planet Vassek . There , EV - A4 - D served as a repair droid and doctor to Grievous . Aside from his duties as Grievous ' s personal physician , EV - A4 - D also acted as the caretaker of the Vassek facility , overseeing its day - to - day maintenance , managing the general ' s IG - 100 MagnaGuard bodyguards , and feeding Gor , Grievous ' s pet roggwart . The general was fond of Gor , but believed his abilities as the castle guardian could be improved . As such , Grievous enlisted the aid of EV - A4 - D in attaching cybernetic limbs , exoskeletal plates , and armor to the roggwart . Over the course of the war , EV - A4 - D grew used to his master returning from the battlefront in need of repair , and at one point he was aware of the reasons behind Grievous ' s transformation from a proud Kalee warrior into a cyborg subordinate of Confederate Head of State Count Dooku . This information was eventually erased from his memory . In 22 BBY , Separatist Council member Nute Gunray was captured by Republic forces after a failed attempt to bring Rodia into the Confederacy . Shortly after his capture , Gunray escaped from captivity aboard the Republic Star Destroyer " Tranquility " and fled in a stolen Republic frigate . Gunray ' s escape presented Dooku with an opportunity to reassess Grievous ' s abilities to lead the Droid Army , which had been called into doubt after a recent string of defeats . While Grievous was away from his castle , Dooku planted the homing beacon of Gunray ' s frigate within the general ' s lair , and also remotely deactivated Grievous ' s IG - 100 MagnaGuards , leaving EV - A4 - D to believe that Grievous himself had deactivated them . Intruders . Following the placement of the tracking beacon , High Jedi General Kit Fisto and Jedi Knight Nahdar Vebb arrived on the third moon of Vassek with a small force of Republic clone troopers , having tracked down the Republic frigate in the hopes of recapturing Gunray . Dooku and Gunray revealed their manipulations to the Republic forces via hologram , leaving the Jedi to plan the capture of Grievous instead of Gunray . The group resolved to take Grievous into custody upon his arrival at his castle . When he returned to his lair , Grievous was ambushed by the Republic forces . In the following duel , Fisto severed the general ' s legs with his lightsaber , and Grievous ' s faceplate was damaged by blaster fire . The general escaped into the castle ' s control room , where he was met by EV - A4 - D , who reprimanded him for allowing the Jedi to damage him , and informed Grievous of his guards ' deactivation . EV - A4 - D left and began preparations for repairing the cyborg , while Grievous remained in the control room to release Gor , whom he hoped would be able to kill the intruders . However , Grievous was pulled away from watching Gor ' s efforts by EV - A4 - D , who was ready to take Grievous in for repairs . In the castle ' s operating theater , EV - A4 - D began removing Grievous ' s damaged parts , replacing his severed legs with new limbs and painfully lifting away the general ' s faceplate in order to place a new one on . After completing Grievous ' s repairs , EV - A4 - D followed the general back to the control room , informed Grievous of an incoming transmission from Dooku , at which point Grievous learned of Dooku ' s deception . This , coupled with the Jedi ' s defeat of Gor , spurned Grievous into hunting down the Jedi himself , despite EV - A4 - D ' s insistence that he take time to rest . While Grievous left to combat Vebb and Fisto , EV - A4 - D remained within the control room to monitor the castle ' s security cameras . Upon catching sight of the Jedi attempting to enter the control room , EV - A4 - D alerted Grievous via the stronghold ' s speaker system . Fisto opened the entrance to the control room , but Vebb insisted upon remaining outside to confront Grievous . While the two Jedi argued about their course of action , EV - A4 - D resealed the entry to the control room , locking Fisto within and leaving Vebb outside to engage Grievous on his own . EV - A4 - D gleefully watched Grievous gain the upper hand in his duel with Vebb and encouraged the general to kill the Jedi . However , the droid forgot about Fisto , realizing too late that he was now locked in the control room with the Jedi . Fisto approached EV - A4 - D from behind and destroyed the droid by decapitating him through the control room chair with his lightsaber . Shortly after EV - A4 - D ' s destruction , Grievous killed Vebb , but Fisto was able to escape . Rebuilt . Following the Jedi ' s escape , Grievous found EV - A4 - D ' s destroyed body and had the droid reconstructed . Once repaired , EV - A4 - D left Vassek ' s moon with his master , no longer relegated solely to housekeeping and repair work . In addition to his position as Grievous ' s doctor , the droid became an advisor to the cyborg , and accompanied him during his time away from the Vassek castle . EV - A4 - D was present during Grievous ' s attack on the Kel Dor homeworld of Dorin in the Expansion Region , during which the cyborg general attempted to exterminate the native population . In the latter stage of Grievous ' s initial assault , EV - A4 - D informed the general of an incoming transmission from Asajj Ventress , a Confederate commander and Dark Acolyte apprentice of Count Dooku ' s . Although Grievous was unwilling to accept the communication , EV - A4 - D convinced him to listen to Ventress , who was relaying a message from Dooku himself . Ventress warned the general of a Republic fleet that had departed Coruscant and was headed to reinforce the natives of Dorin and explained that the fleet was under the command of Jedi General Anakin Skywalker , who could easily turn the tide of battle . Grievous was undeterred by the information , and ordered EV - A4 - D to begin preparations for the arrival of the Republic fleet . Characteristics . Similar to other EV - series supervisor droids from MerenData , EV - A4 - D displayed a cruel personality . While successful in increasing the productivity and efficiency of the medical droids working on Tauber , EV - A4 - D ' s practices concerned the organic doctors he worked with . His methods eventually led to his dismissal when he ordered the medical droids to refuse painkillers to the hospital ' s patients , causing needless pain for the individuals that the hospital meant to help . With the transfer to Grievous ' s Vassek castle , EV - A4 - D ' s high - level abilities as a supervisor and taskmaster went unused , as his responsibilities were limited to housekeeping and the management of a small force of MagnaGuards . EV - A4 - D grew bored with his work and wished for excitement — a wish that was granted with the arrival of Fisto and Vebb . Although normally highly attentive , EV - A4 - D became careless during the intrusion , losing track of Fisto and realizing only too late that the Jedi was directly behind him , prepared to strike . During his service to Grievous as the cyborg general ' s personal doctor , EV - A4 - D developed an uncommon relationship with his patient . Although normally unwilling to tolerate insolence or disrespect , Grievous endured the droid ' s criticism of his abilities and demands during repairs . Although A4 - D worked diligently to ensure quality repairs , the droid enjoyed the opportunity to inflict pain upon the Kaleesh during his reconstructive surgeries . EV - A4 - D was curious of the reasons behind Grievous ' s physical transformation and took care in ensuring his work on the mechanical body would not go to waste , insisting that Grievous take time to rest after his repairs . The droid was delighted at Grievous ' s prowess during his duel with Vebb , cheering him on moments before he was bisected by Fisto ' s attack . While most of EV - A4 - D ' s bronze - colored body resembled that of other EV - series droids , EV - A4 - D possessed modifications that allowed him to serve as Grievous ' s doctor . A small attachment that hung over one of EV - A4 - D ' s white photoreceptors housed his logic center . Several arms that were attached to his torso and back had medical instruments affixed to the ends , while one of EV - A4 - D ' s primary upper limbs was affixed with a " carousel arm " that allowed for rotation at the wrist between a surgical laser and a precision gripper . Circulatory fluid used during surgical operations hung from a limb extending from the droid ' s back . EV - A4 - D also had a supply palette attached to his waist and magnetized feet . Behind the scenes . EV - A4 - D was created for the . To date , the droid ' s only appearance was in the episode " Lair of Grievous ; " however , at the time of the episode ' s original air date , EV - A4 - D was known simply as " A4 - D . " The droid ' s full name was not revealed until the episode ' s " " re - airing , which also introduced EV - A4 - D ' s backstory as a hospital supervisor . His backstory was later expanded in his StarWars . com Databank entry . The droid was created when Series Director Dave Filoni expressed his interest in having Matthew Wood , the voice of General Grievous , and sound designer David Acord perform in a scene together . The episode ' s writers decided to have Acord play Grievous ' s mouthy doctor droid . Wood , Filoni , and Acord brainstormed together on what the droid would sound like , hoping to find a speech pattern as far from Grievous ' s as possible . Acord eventually settled on the distinctive speaking style of the late . In the DVD featurette for " Lair of Grievous " , Filoni expresses his regret for killing off EV - A4 - D at the end of the episode . The director indicates that he would be interested in bringing back the droid as a disembodied head carried around by Grievous in future episodes of the series . EV - A4 - D did eventually make a return to the series , albeit not in an episode , but rather a script presented at the Star Wars Fan Days III convention that served as a prelude to the episode , " Landing at Point Rain " . Inconsistencies and non - canon material . In the " " included in " Star Wars Insider 106 " , EV - A4 - D is incorrectly labeled as astromech droid R6 - H5 . The " Galaxy at War " sourcebook from Wizards of the Coast contradicts the " Lair of Grievous " decoded episode by stating that the droid is named A - 4D and is an A - Series medical droid . The " " refers to the droid by his abbreviated name used in the original episode , A4 - D . EV - A4 - D is featured in " The Clone Wars " Animated Comics , a series of short , non - canon videos based on LEGO products . In Episode 4 : " A Grievous situation " , A4 - D accompanies General Grievous to Tatooine , where the cyborg was shot down during a dogfight over the planet by Jedi Master Plo Koon . While the general sunbathed in the desert ' s twin suns , EV - A4 - D worked to reattach the limbs his master lost in the crash . The droid was unable to do so before the arrival of Republic forces , resulting in Grievous ' s arms falling off his body when he attempted to duel Nahdar Vebb . Grievous carries EV - A4 - D off - screen , where the droid quickly finishes his repairs so that the general can return to his duel . Grievous is forced to retreat when Koon arrives to provide support to Vebb , but leaves EV - A4 - D behind with the Republic forces . This video is available on the LEGO Star Wars website , and features the option to view the story from either the Republic or Confederate perspective . EV - A4 - D also appears in the non - canon video game " " , released on March 22 , 2011 . A4 - D appears in the game ' s adaptation of " Lair of Grievous , " wherein his role as Grievous ' repair droid is humorously portrayed , as A4 - D forces the droid General to take a spoonful of medicine . After the completion of this mission in the Nintendo DS version , A4 - D is also unlocked for use in the Free Play mode of the game .