CT - 5555 / Legends CT - 27 - 5555 , also known as ARC - 5555 and later re - designated as CT - 5555 , was a clone trooper who served in the Grand Army of the Republic during the Clone Wars . Because of his clone designation , he was given the nickname " Fives . " Around 22 BBY , right about the time that the clone war had begun , Fives was assigned to Domino Squad , a unit of clone cadets that trained within the planet Kamino ' s clone military education complex , under the command of the Siniteen Sergeant Bric . Fives and his squad were required to pass a test in order to become battle - ready clone troopers . After the completion of their training , Fives , along with a number of other rookie clone troopers , was assigned to Rishi Station , a listening post located on the moon of Rishi . Fives was present when the Confederate General Grievous invaded the moon to take control of the Republic listening post . With the arrival of Clone Commander Cody and Clone Captain Rex , the two clone officers helped Fives and the surviving rookie troops retake the outpost . Fives and trooper Echo , the only rookie survivors of the battle , were rewarded with medals for their service on the Rishi moon and were inducted into the 501st Legion . They later helped defend Kamino after Grievous , along with Dark Acolyte Asajj Ventress , invaded the planet and attacked Tipoca City . Following the Confederate attack on Kamino , Fives and Echo were promoted to ARC troopers for their continuous efforts . As the war continued , both Fives and Echo joined Jedi Generals Obi - Wan Kenobi and Anakin Skywalker in the rescue of Jedi Master Even Piell from the Confederate prison known as the Citadel . After they rescued Piell and his officers , the facility ' s warden , Osi Sobeck , released battle droid forces on Fives and the Republic group . While Echo and Piell perished during the battle , Fives and the surviving members of his team were rescued by Jedi Master Plo Koon . Some time later , Fives was assigned on special assignments to the 501st legion during the attack on Umbara . When General Pong Krell took over command from Anakin Skywalker , Fives was the loudest voice against Krell and his leadership . Fives was later proven correct when Krell revealed himself to be working against the Republic . Fives was also present during the Battle of Ringo Vinda . When his friend Tup went crazy and killed Jedi General Tiplar , Fives took him back to Kamino for further medical study . Fives found surprising evidence that contradicted what the Kaminoan scientist , Nala Se had found , which led him to conduct a full study and research on his own , hiding from Republic authorities . When Shaak Ti ordered him to present his evidence to the Chancellor , Nala Se drugged him and Palpatine faked an assassination attempt . On the run , Fives tried to convey his information to General Skywalker and Captain Rex . However , he was tracked by Commander Fox and a group of Shock Troopers . When Fives tried to defend himself , Fox shot him through the heart . Fives died knowing the truth about Chancellor Palpatine and Order 66 , but was unable to communicate this to anyone before it was too late . Biography . Clone cadet on Kamino . CT - 27 - 5555 was a clone trooper who served in the Galactic Republic ' s Grand Army . Around 21 BBY , during the Clone Wars , CT - 27 - 5555 was assigned to Domino Squad , a unit of clone cadets . Due to his clone designation ending with 5555 , CT - 27 - 5555 preferred to be called " Fives . " The other Domino Squad clone cadets — Cutup , Hevy , Echo , and Droidbait — preferred to call him by his clone designation number , though Fives wanted to be called by his nickname . Fives and Domino Squad trained in Tipoca City , the capital of the planet Kamino . Their training at the clone military education complex was overseen by the Siniteen Sergeant Bric , who also watched the squad during their combat simulation practice tests . During their simulation battles , each clone cadet , including Fives , used non - lethal weapons , so that no clone could be injured during one of their simulations . Furthermore , all clone cadet squad members had to work as a team to successfully pass the simulation . The Domino Squad clones , however , rarely got along with each other as a team . During one of their combat simulation tests , Fives engaged in several arguments with fellow trooper Droidbait , who was calling Fives by his designation number . As the test continued , Hevy broke formation from the struggling group , while Fives , Echo , Droidbait , and Cutup remained behind barricades . The training evaluators supervising the group — Bric , the Arcona El - Les , and Jedi Master Shaak Ti — took concern with Domino Squad ' s recklessness . Since Domino Squad could not work as a team , Fives and the rest of the squad failed the test , and the squad departed to the complex ' s barracks . After returning to the barracks , Echo and Hevy got into an argument and then a fight , but the brawl was broken up by the immediate arrival of Bric . The Siniteen Sergeant wanted Fives and the rest of Domino Squad to cooperate with each other , stating that they would be a waste of his time if they continued to disagree . The next day , Bric and El - Les rallied Domino Squad , as well as some of Tipoca City ' s other clone cadet squads , for a meeting outside the military complex on a hangar deck . Clone Commander Colt , an ARC trooper , was to watch the clone cadets ' final combat simulator test . If one past the test , the troopers within the squad would be promoted to a clone trooper . Colt took interest with Bravo Squad , a clone cadet unit that had passed passed certain tests in " ARC trooper time . " Since they were on - deck to take the test after Bravo Squad , Fives and Domino Squad observed the unit ' s test , noting their ability to work as a team . After Bravo Squad ' s test concluded , Fives and Domino Squad entered the simulation room and began their test , quickly completing certain parts of the simulation faster than their usual rate . As Fives , Echo , Droidbait , and Cutup took cover behind some barricades , Hevy , who was destroying droids with his Z - 6 rotary blaster cannon , cleared a path for them . When Droidbait broke away from the group , however , a droid shot him in the back . Cutup noticed this and yelled out for Hevy to stop , though Hevy wanted his team to head for the simulation ' s citadel tower to complete the test . However , because Fives and his squadmates left Droidbait behind , El - Les and Colt immediately ended their test and told them that they had automatically failed . After failing the test , Fives and the clone cadets returned to their sleeping quarters . For Fives and Echo , however , the two clone cadets felt that they did not belong within Domino Squad . Hoping to get transferred to a different clone cadet squad , preferably Bravo Squad , Fives and Echo went to Jedi Master Shaak Ti and requested a transfer . However , Ti denied their request and revealed that she had faith within Domino Squad . Because she had confidence in the clone cadets , she gave Domino Squad another chance to take the test . The next day , Ti joined Bric , El - Les , and Colt in supervising Domino Squad ' s final attempt at passing the test . Fives and his comrades managed to reach the bottom of the citadel tower , at which point they noticed that the ascension cables in their belts were missing . The clones instead improvised and decided to climb the blaster turrets that acceded up toward the citadel ' s roof . Once Fives and the troops successfully climbed the turrets , Hevy himself lifted the pole on top of the citadel , which completed the test . Ti and El - Les commended Domino Squad ' s efforts , and due to them working as a team and completing their final test , the members of Domino Squad were allowed to become battle - ready clone troopers . They each received their own medals , as a symbol for their graduation from clone cadet . Service on the moon of Rishi . After several former members of Domino Squad — Echo , Cutup , Hevy , and Droidbait — were given their first off - world assignment , Fives was given his first assignment as well . Joining his former Domino Squad teammates , Fives was stationed at a listening post located on a moon of the planet Rishi . Under the command of Clone Sergeant O ' Niner , Fives and the clone troopers , along with troopers Nub and CT - 327 , maintained the listening post to warn the Republic of any impending Confederate attacks on the nearby Kamino . As O ' Niner reported , Rishi Station soon became host to a clone inspection team as part of the base ' s routine examinations . Unbeknownst to the clone troopers , however , the Confederate General Grievous planned to attack Kamino in order to end the Republic ' s production of clone troopers . Grievous knew that if he attacked Kamino , the Rishi moon listening post would detect the attack , and the stationed troopers at the listening post would turn off the base ' s " all - clear " signal , which would alert the nearby Republic fleet to the invasion . Grievous therefore deployed BX - series droid commandos in " Droch " - class boarding ships to take over the listening post . Meanwhile , a clone trooper raised the listening post ' s shield to protect the base against what appeared to be an approaching meteor shower , which was actually the squadron of " Droch " - class boarding ships . The droids soon left their transports and began their attack on the Republic base . After three commando droids shot and killed O ' Niner , Droidbait , and Nub , the remaining clone troopers — Fives , Echo , Hevy , and Cutup — evacuated the command center by exiting through a ventilation shaft , which led them outside the listening post . Leaving the ventilation shaft , the four rookie troopers were disheartened when a Rishi eel attacked and devoured Cutup , leaving only Fives , Echo , and Hevy to defend themselves . Eventually , they sighted the " Obex " , a " Nu " - class attack shuttle flown by Clone Commander Cody and Clone Captain Rex . The clone officers had arrived for the inspection of the listening post and were unaware of the droid attack . After the two were attacked by the invading droids , they escaped and met with Fives and the other rookie troops . Having encountered a commando droid disguised in clone armor during their skirmish with the droids , Rex demanded that the rookies remove their helmets to verify that they were indeed clones . After the three rookie troopers obeyed and removed their headgear , another Rishi moon eel attacked them . Rex used his DC - 17 hand blaster to kill it with a single shot to the eye , a feat that impressed the rookies . When talking with the rookie troopers , Rex dubbed them " shinies , " a derogatory term referring to the troopers ' spotless armor that had not yet seen action in battle . Rex and Cody gave Fives and the other rookie troops their DC - 15S carbines , and Rex suggested a plan to retake the listening post . The group of clone troopers hid near the entrance of the base while Rex impersonated commando droid unit 26 by using the droid ' s decapitated head . The Clone Captain successfully tricked units 07 , 08 , and 09 to open the listening post ' s main door , allowing Fives and the clone troopers to ambush the remainder of the commando droids inside the base . The clones defeated the droid units , including their vibroblade - wielding leader . Nevertheless , their victory was cut short when the clone troopers noticed that General Grievous ' s fleet had arrived above the moon . Due to the lack of response from the commando droids , Grievous sent more battle droids to the listening post . The clones , inside the command center of the listening post , were unable to turn off the " all - clear " signal because the droids had hot - wired it . Soon , a droid landing craft descended through the moon ' s atmosphere and landed at the listening post . With the battle droid reinforcements outnumbering the clone troopers , Rex — to the surprise of the rookie troops — ordered the complete destruction of the base . When both Fives and Echo told the Clone Captain that their duty was to protect the base , Rex dismissed their objections , stating that if the base was destroyed , it would turn off the all - clear signal and alert the nearby Republic fleet of the impending Separatist invasion . To destroy the base , Echo offered the use of highly explosive liquid tibanna , which was used as a fuel source at the station when the Rishi moon entered its freezing cycle . While Rex and Echo went to retrieve the plunk droids that stored the liquid tibanna , Fives , Cody , and Hevy grabbed weaponry from the listening post ' s supply room . With their new supply of weaponry , the clones attacked the invading battle droid forces , buying time for Rex and Echo to wire the three plunk droids together . However , the remote activator to detonate the tibanna inside the plunk droids did not function properly . Hevy offered to stay behind and correct the problem before joining the other clones as they fled the listening post through a nearby ventilation shaft . Once outside , Rex found — to his surprise — that Hevy hadn ' t yet evacuated the listening post . The Clone Captain contacted Hevy via comlink , but Hevy refused to evacuate the listening post until he was able to repair the detonator . Unwilling to accept Hevy ' s decision , the clones ran to rescue the rookie trooper . Before they were able to re - enter the facility , however , Hevy manually detonated the explosives . The listening post exploded , killing Hevy and all of the droid forces inside . Shortly thereafter , Rex , Cody , Fives , and Echo were picked up by an LAAT / i gunship that carried them off the moon . On board the " Venator " - class Star Destroyer " Resolute " , Jedi Generals Obi - Wan Kenobi and Anakin Skywalker awarded Fives and Echo medals for their service . Following the presentation of the medals , Rex inducted the two clones into the 501st Legion for their part in helping the Republic to thwart the Separatist attack . Protecting Kamino . Several months after the destruction of Rishi Station , Fives , with Echo , joined the 501st Legion in a number of battles throughout the galaxy . While stationed aboard the " Resolute " , Fives and Echo were tasked with taking inventory of the Star Destroyer ' s supplies , as well as guarding the ammunition . When the Republic learned that the Confederacy was about to invade Kamino , Fives , along with Echo , Kenobi , and Skywalker , were dispatched to the world to prepare for the impending attack . While Kenobi and Skywalker met with Shaak Ti and Kamino Prime Minister Lama Su , Fives and Echo roamed through Tipoca City ' s military complex . The two clones soon spotted their old clone trooper friend , 99 , who was glad to see them , but questioned Hevy ' s absence . When they revealed that Hevy had sacrificed himself to save the others on the Rishi moon , 99 showed the two Hevy ' s medal , and told them that Hevy had given it to him . Once Fives and Echo told 99 about the suspected Confederate invasion of Kamino , 99 departed to the facility ' s weaponry room to gather weapons for the clone troopers . Soon after the Confederacy began its assault on Tipoca City , Fives and Echo met with an ARC trooper in a docking bay at the military complex . The ARC trooper gave Fives and Echo the task of going outside on a platform bridge in sniper position to repel the invading battle droids . The two 501st troopers complied and left for the bridge , and once there , they situated themselves and prepared for battle . Separatist trident drill craft , led by the Confederate General Grievous and Dark Acolyte Asajj Ventress , climbed the outside structures of the city . While the ships caused structural damage to the buildings due to their drills , they also deployed battalions of B1 battle droids and aqua droids , which attacked the stationed clone troopers . On the bridge , Fives and Echo utilized their DC - 15 carbine blasters to shoot down the nearby droids . After 99 visited the two clones and resupplied them with ammunition and thermal detonators , battle droids stormed the area , though they were destroyed when Echo tossed a detonator at them . Not long after , a squad of clone cadets approached Fives , Echo , and 99 , and told them that they were lost , since they had been separated from their group . With Fives and Echo , 99 offered to bring them back to the military complex ' s barracks . Once there , Commander Cody and Captain Rex joined the group and told Fives , Echo , and the clone cadets that they were going to fight off the droids . However , the clone cadets disagreed , due to their training being inadequate . Fives tried to boost the clone cadets ' confidence , though the cadets still remained hesitant about engaging the droids . 99 entered the conversation by telling the clones that he knew where the complex ' s armory room was : if the clones could gather enough weaponry and supplies , they would be able to hold off the droids . After gathering the supplies , the clones repelled Grievous ' s droid forces , which attempted to enter the barracks . Fives and the clones began to fire at the droids , and lured them inside the barracks room . The clones took defensive positions behind crates as the droids continued their pursuit . Soon , however , the clones around the crates began to be overwhelmed by the droids . Rex used his comlink to alert the clone cadets , who were hidden inside the sleeping bunkers , to reveal themselves to the droids . As they began to fire at the droids , Fives and the others continued as well . However , 99 noticed that the clones were running out of thermal detonators . Despite being told not to retrieve more by Rex , since it was too dangerous , 99 ignored the order and ran toward a nearby door . Yet , battle droids fired upon the clone and killed him . After 99 ' s death , Fives and his comrades destroyed the remainder of the droids . Grievous and Ventress were meanwhile forced to flee from Kamino , resulting in a Republic victory . Fives and Echo later joined Cody and Rex at one of the military complex ' s hangars . Because of their accomplishments during the invasion , both Fives and Echo became ARC troopers . Citadel mission . Fives later took part in the rescue of Jedi Master Even Piell , who had been captured by the Confederacy , which wished to extract information about the secret Nexus Route hyperlane that the Jedi Master possessed . In the Jedi Temple on Coruscant , Fives and Echo joined Skywalker , Kenobi , Jedi Master Plo Koon , Cody , and Rex during a briefing at the Temple ' s communication center . As they orchestrated a plan to free Piell , the team knew that any attack on the the Citadel , the Confederate facility in which Piell had been imprisoned , would be rendered useless due to its security . Skywalker , however , devised a plan of encasing the team in carbonite in order to avoid detection , as the facility ' s security utilized lifeform scanner s . Soon after that , his astromech droid , R2 - D2 , along with a group of reprogrammed B1 battle droids , would fly the carbonite blocks to the Citadel . After the meeting , Fives and the team departed to the Temple ' s hangar bay , where a carbon - freezing chamber , maintained by Ugnaughts , was located . Because of the complexity of their mission , as well as noticing R2 - D2 ' s battle droid force , Fives told Cody and Rex his worries of entrusting their lives to the droids . Yet , Cody agreed with Skywalker ' s plan , as the droids would not be detected . After Fives and the team were encased in separate carbonite blocks and stored in a Class Type B escort shuttle , a variant of the " Sheathipede " - class transport shuttle , R2 - D2 and the battle droids flew the shuttle to the Citadel , located on the planet Lola Sayu . After passing through the prison ' s life - form scan check , R2 - D2 and the battle droids landed the shuttle near a cliff by the Citadel . R2 - D2 released the team from their carbonite blocks , and they regrouped . Leaving R2 - D2 , the battle droids , and the shuttle behind , Skywalker and Kenobi led Fives and the team closer to the cliff ' s edge . Noticing that they could not utilize ascension cables to reach the top of the cliff due to touch - sensitive electro - mine s , devices that would sound an alarm within the prison facility , along the cliff face , Skywalker and Kenobi told Fives and the rest of the team that they would have to free - climb the cliff . Near the top of the cliff , the team noticed a doorway that led into the Citadel itself was being ray shielded . Skywalker ' s Padawan , Ahsoka Tano , entered the Citadel through a nearby ventilation shaft , and she deactivated the ray shield to allow the team to enter . Nearby the others , Fives was helping Rex and another clone , Charger , reach the top of the cliff . However , when Charger grabbed Fives ' s hand , he slipped and free - fell down toward an electro - mine , which killed him and sounded the Citadel ' s alarm . Despite alerting the Citadel of their presence , Fives and the team proceeded into the prison . After entering one of the Citadel ' s detention area hallways , the team found out that the walls surrounding them contained hidden blaster turrets . Once the turrets revealed themselves to the group , the Jedi utilized their lightsabers to deflect the blaster fire , while Fives and the clones fired at the turrets . Despite the setback , the team continued on and found Piell inside a holding cell , and released him from captivity . Though they rescued Piell , the Jedi Master wanted to find his officers , who had also been taken captive by the Confederacy , as one of Piell ' s officers , Wilhuff Tarkin , held in his memory half of the coordinates of the Nexus Route ; Piell was in possession of the other half . Piell and Tarkin had memorized the coordinates so that they would not fall into Confederate hands . Still within one of the Citadel ' s detention hallways , Echo and the team were confronted by a group of commando droids , released by the prison ' s warden , Osi Sobeck . A firefight erupted , and the Republic team destroyed the first wave of droids . Sobeck , who was watching the fight via the prison ' s security camera system , released more droids and activated the hallway ' s magnetized ceiling , which took Fives and his team ' s weapons , albeit leaving the commando droids ' weaponry intact . The clones tried to attack the droids with bare hands , while Kenobi , Tano and Piell used the Force , but neither tactic worked due to the droids being magnetized to the floor . Skywalker , however , disabled the magnetized ceiling , which allowed his team to re - equip themselves and finish off the droids . They soon located and freed Piell ' s men — Tarkin and several clone naval officer s — from a holding cell . Believing that they might run into more trouble with Osbeck ' s prison guards , Kenobi decided the team should split up : Piell , half of his men , and Cody would go with Kenobi to create a diversion , while Fives , Echo , Rex , Skywalker , Tano , and Piell ' s other officers , including Tarkin , would stay together and find an escape route that would lead them out of the prison . With Piell and Tarkin separated , if one squad was to be captured , the enemy would only have half the information . As Kenobi ' s team detonated a series of explosives in one of the corridors , Skywalker cut his way through the wall to an old tunnel — of which the strike team knew thanks to some old archive data on the Citadel — and Fives and Echo resealed the entrance before continuing onward through the tunnels . Skywalker , having contacted R2 - D2 and instructed him to land the shuttle near their location , led his group through the tunnels . When they reached a dead - end , they were ambushed by several commando droids , which were armed with energy shields . Without warning , Tano tossed a few thermal detonators under the droids ' feet , which destroyed them . After Tano used more explosives to blow their way through the rock , Fives and the others proceeded toward a nearby pipeline . Moving on through the pipeline in search of a way to reach R2 - D2 ' s shuttle , Fives and the team soon arrived at an exit point from the pipeline . However , outside of the exit hatch , a battalion of battle and crab droids ambushed them . The group escaped , and Skywalker tossed a grenade into the fuel line . The resulting explosion destroyed the droids . Skywalker ' s team went to Kenobi ' s position , finding the Jedi Master and his men pinned down by droids that were guarding the shuttle . Fives and Echo joined the battle , as more and more droids arrived . When a commando droid , who was stationed on top of a watch tower , began to fire at their shuttle with a laser cannon , Fives reported this to Skywalker . Skywalker and Piell swooped in to attack on a commandeered STAP but were knocked out . While Fives told Echo to stay with him , Echo was determined to protect the shuttle . When the clone picked up a fallen commando droid ' s shield to defend himself and attempted to reach the shuttle , the droid destroyed the Republic team ' s shuttle , killing Echo in the process . Despite Echo ' s sudden death , Fives and the rest of the team continued on , away from their destroyed shuttle . With the destruction of the shuttle , their only means of transport off Lola Sayu , the group contacted the Jedi Council for assistance . Plo Koon told them he would come to their aid , though they needed to proceed to a rendezvous point for extraction . Passing through the lower levels of the Citadel , Fives and the others made their way outside of the Citadel , albeit still nearby the facility itself . Still being hunted by Sobeck ' s droid force , R2 - D2 ' s battle droid force was determined to stay behind , while Fives and the rest of the team descended down a cliff with cables . They proceeded toward various cave structures before Sobeck ' s anoobas found and attacked the group . The anoobas grievously injured Piell , who gave Tano his knowledge of the Nexus Route prior to succumbing to his injuries and dying . Fives , as well as the remaining team members , were present during Piell ' s funeral by a molten sulfur pit . Fives and the team proceeded to the rendezvous on an island , though Sobeck and a team of droids soon arrived , mounted on separate STAP speeders . The Citadel warden attacked and his speeder was shot down by Fives . Sobeck attacked Tarkin in a fit of rage because he couldn ' t get the information out of him , but Tano killed Sobeck . After arriving in the system with a rescue fleet of " Venator " - class Star Destroyers , Koon rescued Fives and the team members with an LAAT / i gunship . The group returned to Coruscant shortly thereafter . Apart from Rex and Cody , Fives was the only surviving member of the original rescue party . Battle of Umbara . After Umbara seceded to the Separatists , Fives was reassigned on special assignment back to the 501st Legion when the Republic invaded the planet of Umbara . After the 501st landed , Fives and Hardcase were almost eaten by a vixus , but Fives was able to kill it by giving it a grenade . After the Umbarans ' sneak attack and the Republic airstrike , Fives and the rest of the 501st Legion came under the command of Jedi Master Pong Krell . When Krell ordered the 501st to move across the main road , Fives and Rex did not approve of this course of action . The party then walked into mines , which Fives was able to locate , and were ambushed by the Umbarans . Fives fought until Captain Rex ordered the 501st to fall back . After repelling the natives ' attack , Fives spoke up against General Krell , defending Captain Rex ' s actions despite being threatened by Krell . Obi - Wan Kenobi , who was leading the 212th Attack Battalion , contacted Krell ordering him to take out an airbase that was supplying the capital . After Krell ' s plan to march straight down the narrow gorge at the airbase failed , and was causing heavy casualties , Fives was assigned , along with Hardcase , to infiltrate the base and commandeer two Umbaran starfighters to destroy the enemy tanks . The 501st were then ready to attack the capital directly , but Krell was going to march directly on it without taking out a supply ship that was sending missiles down on the troops . Fives , along with Hardcase and Jesse , disobeyed Krell ' s direct orders and used the captured Umbaran starfighters to blow up the supply ship from the inside , at the cost of Hardcase ' s life . This resulted in Fives ' and Jesse ' s court marshal . Rex tried to convince Krell not to court marshal them , but this only resulted in him ordering their execution . Fives reminded the troops that they were not droids , who follow orders unthinkingly , and said that Krell ' s orders were wrong . The execution squad purposefully missed Fives and Jesse , angering Dogma and Krell , though the latter decided to postpone the execution upon learning that the Umbarans had seized clone armor and weaponry . Rex found out that the attack was actually set up by Krell as an act of betrayal ; the worst loss of all was Waxer . After making plans to arrest their general , Rex and the others freed Fives and Jesse to assist them in arresting Krell . Pursuing him into the forest , Krell told Rex he should ' ve listened to Fives when he said he was using the captain ' s loyalty to fuel his scheme . Ultimately , the clones captured Krell due to some resourcefulness from Fives ' friend Tup . Upon learning from Krell that the Umbarans were making their way to the airbase and how he intended to make his escape when he did , Rex spoke with Fives , Jesse and Tup about what to do with Krell , ultimately agreeing that Krell would have to die . As Rex made ready to shoot Krell , Dogma , who had been sent to the brig and become destraught by Krell ' s betrayal , was set free by Jesse . Before Rex could shoot Krell , dogma took one Fives ' s pistols and shot Krell himself . In the aftermath of the battle , the Republic finally succeeded in taking Umbara . Before shipping off , Rex asked Fives what the whole point to fighting the war . Fives said he didn ' t know , that he wasn ' t sure any of them knew , but he was sure the war would one day end , though Rex admitted his unpleasant feelings about the future . The Biochip Conspiracy . During a mission on the orbital ring space station of Ringo Vinda , Tup suddenly began to act irrationally , switching between periods of normality and a strange trance - like state . In the latter condition , he inexplicably opened fire on Jedi Master Tiplar , killing her . A medical check proved to be inconclusive , so Tup was to be sent to Kamino for further investigation . However , just before the transport could get underway , the shuttle was ambushed by Separatist forces and Tup was kidnapped . Fives participated in the subsequent successful retrieval of Tup alongside Anakin Skywalker and Captain Rex , and as another transport was prepared , he asked Rex to come along in order to be with his friend ; a request that was granted . Upon arriving in Kamino , Fives bore witness to Tup ' s deteriorating condition as the check went underway , even though strangely no clue was found to the trooper ' s apparent irrationality . However , Tup ' s condition awoke concerns among the Kaminoans , and they decided to contact Master Tyranus . As it turned out , Tup ' s condition resulted from an organic biochip implanted in the brain of all clone troopers at an early stage of their embryonal development , with Tup ' s chip suffering an unexpected malfunction . The Kaminoans were told that the chip and the programming it contained was meant as a safety measure in the case the Jedi went rogue , so that all clone troopers would ultimately ( and ostensibly ) remain obedient to the Galactic Republic . In order to keep this from Master Shaak Ti , Kamino ' s Jedi supervisor , Nala Se , the physician in charge of the investigation , attempted to manipulate and falsify ( or hide ) the results of Tup ' s medical check . However , Fives , desperate to save his friend and brother , launched an investigation of his own , assisted by the medical droid AZI - 3 , whom he managed to persuade that acting against the rules would help save Tup ' s life . By performing a deep - reaching brain scan , Fives and AZI - 3 discovered the biochip hidden in Tup ' s brain and retrieved it , but the operation and Tup ' s deteriorated condition inadvertently resulted in Tup ' s demise . When Fives subsequently learned from AZI - 3 that his memory was to be erased and he was to be reassigned to the medical station of Tipoca City ( an intention of which Shaak Ti bore no knowledge ) , he escaped custody and , after leaving a false trail , sneaked into the clone laboratories to find out whether all the clones had been tampered with . After finding this evidence - and having his own chip removed by AZI - 3 , he presented the facts to Shaak Ti , who ordered the chips and Fives to be brought to Coruscant for a presentation of his case to Supreme Chancellor Palpatine , not knowing that she was actually playing right into the enemy ' s hands . However , en route to Coruscant , Fives was drugged by Nala Se to slow his reactions . Upon hearing the facts , Palpatine insisted upon a private discussion with Fives and then faked an attempt on his own life , making Fives a marked fugitive . When the Jedi Council learned of this alleged attack , they decided to launch a secret investigation of their own , with Anakin and Rex deciding to find and approach Fives in order to find out the truth . While trying to lose his pursuers , Fives ran into his fellow trooper Kix and tried to relay the horrendous news to him . Kix arranged a meeting with Anakin and Rex , the only people Fives still trusted , but Fives was spotted and tracked down to the meeting point . In the meantime , Fives tried to plead his case to Anakin and Rex , even trapping the pair in ray shields , but his drug - hazed state and his own agitation made his explanations about a conspiracy against the Jedi and the Chancellor ' s involvement sound incoherent . When Commander Fox and a platoon of Coruscant guards appeared to take Fives in , the desperate ARC Trooper tried to keep them away with Rex ' s pistol , but was fatally shot by Fox . Dying in Rex ' s arms , Fives reiterated Tup ' s last words about the " mission " and having found freedom at last . Personality and traits . Unlike the other rookie clone troopers stationed at Rishi Station , who had been there for some time , Fives was sent to the base directly prior to Grievous ' invasion . When he learned of his first assignment , he was proud to serve at a listening post that was critical to the defense of Kamino . At Rishi Station , Fives became acquainted with the rookie clone troopers and Sergeant O ' Niner . He was able to cooperate with the other clone troopers when commando droids invaded the station . Fives showed eagerness to be on the front lines of battle , and , as the clones attacked the droids inside the Rishi Station , Fives ' s eagerness caused him to become injured , with a blaster bolt almost hitting his arm . Fives ' s dedication and service to the Republic earned him a spot within the Republic ' s 501st Legion . Like all rookie clone troopers , Fives ' s armor was sleek white and had no dust or damage from fighting because of his lack of combat prior to the Rishi moon battle . He had a " 5 " tattooed on the top right side of his forehead . Fives also had a well - trimmed goatee and a standard clone hairstyle throughout the war , until prior to his death when he went bald to undergo a surgical procedure . Although Fives was born and trained as a standard clone trooper , he had somewhat higher creativity than his peers , earning him the title of ARC trooper . Though he did not receive additional training since his promotion , he gained a few skills and experience as time passed , no longer being a < nowiki > " shiny " < / nowiki > . Behind the scenes . Fives was first featured in " Rookies , " the fifth episode in the , which aired on October 24 , 2008 . Like all clone troopers throughout the series , he was voiced by Dee Bradley Baker . Fives ' s clone designation number — CT - 27 - 5555 — was revealed in the episode . Fives was given an entry in the 2008 " The Complete Star Wars Encyclopedia " and in the 2009 visual guide " " . Fives later appeared in the episodes " Clone Cadets " and " ARC Troopers " of the of the " The Clone Wars " , which aired on September 17 , 2010 as part of the season ' s premiere . Fives later appeared in the episodes " The Citadel , " which aired on February 18 , 2011 ; " Counterattack , " which aired on March 4 , 2011 ; and " Citadel Rescue , " which aired on March 11 , 2011 .