Rex Goodwin Rex Goodwin , sometimes romanized as Rex Godwin , was a major character in " Yu - Gi - Oh ! 5D ' s " . Goodwin was a former developer from R . R . D . , head of Sector Security , the man from the Daedalus Bridge legend and the primary antagonist at the end of the Dark Signers arc . He is the only Dark Signer to not wear a cloak and the only Dark Signer to not have his dark mark on his right arm ( instead , he had it on his back ) . He bears the dark mark of the Condor and his Earthbound Immortal is Wiraqocha Rasca . His brother , Roman , entrusted Rex with the mission to use the Signers to someday stop him , as Roman became a Dark Signer . Rex used his influence to gather the Signers and assist them , but secretly used them in order to become a Dark Signer and absorb the powers of a Signer by using Roman ' s birthmark , and hoped to recreate the world as a god ( however , in Z - one ' s time - line he was not a Dark Signer ) . Design . Appearance . Rex Goodwin was a tall pale skinned man , with long grey hair that reached into his lower back , with one section of it tied into a ponytail . He wore a dark grey suit and pants , over a collared shirt that featured the Condor geoglpyh emblazoned on it . He lost his left arm in an accident , and replaced it with an artificial robotic one , with a built - in Duel Disk . Goodwin wears a long sleeved suit and white gloves at all times so his mechanical arm goes unnnoticed . When he was much younger , his hair was brown and shorter , and he typically wore a lab coat . After transforming into a Dark Signer , his body bulked up incredibly , and he gained purple markings over his face , and now exposed upper body . He also ripped off his artificial arm and used his new powers to connect his brother ' s arm with the Head Mark of the Dragon on it in place of it . Personality . Rex was a very manipulative man , who usually spoke in a calm , friendly demeanor , and appeared very respectful to others , particularly Jack and referred to him politely as " King - sama " . However he wasn ' t above being physical and direct when he grabbed Mina by the jaw after not wanting to listen to her excuse about Jack . He believed that the separation of the New Domino City and the Satellite was necessary , as they complimented each other well and promoted growth . He sinisterly claimed that he would sacrifice one side for the other , in order to preserve the peace . He was quick to take action in turmoil , as even after Grieger attempted to kill him , he rallied to the audience of the Fortune Cup that he would protect them all as that was his duty as Director , even at the cost of his own life . During the Fortune Cup , he was utterly determined to expose the Signers via his varying agents that he had placed in the Tournament ; and set up various plots in order to do so . He was also incredibly knowledgeable in the Legend of the People of the Stars and information about the Dark Signers . He had great love for his brother , often calling him " nee - san " in the Japanese version , and promised him he ' d take his arm with the birthmark and gather the Signers to stop him and the Dark Signers in the future . After sending the Signers into the Satellite , he revealed to his brother that he had found a new possibility ; to gain the powers of both a Signer and a Dark Signer in order to become the Ultimate God to destroy and recreate the world in order to stop the cycle of conflicts every 5 , 000 years . After he became a Dark Signer , he also believed friendship to be nothing , but after his defeat , he was convinced by Yusei that the means to fight destiny was the bonds with friends , just before he died . Etymology . The word " Rex " is Latin for " King " . This demonstrated his influence and power in both New Domino City and Satellite . Biography . History . Rex and his brother Roman , were scientists who became Dr . Fudo ' s assistants for the development of Ener - D technology . The three of them worked on the project and making steady progress but at some point the Ener - D started behaving strangely and causing abnormal weather every time they tested it . Dr . Fudo wanted cancel the project before something bad happened , much to Rex ' s dismay . Roman was made lead developer after Dr . Fudo ' s request to abort was rejected . Dr . Fudo managed to pass on three of the four control units ; the cards " Red Dragon Archfiend " , " Stardust Dragon " and " Black Rose Dragon " , to Rex after being shot at for taking them . He begged Rex to stop the Ener - D project . Rex went to find Roman and found him in a lab , having just amputated his arm . Roman handed Rex a container with the arm and told Rex to do what it took to defeat him after the Signers appeared . He ordered Rex to leave and hit a self destruct button , which resulted in Zero Reverse , so that he was reborn as a Dark Signer . Rex survived the catastrophe but was left stranded in the Satellite area , which was now a recluded island . Rex constructed a Duel Runner and moved to a coastal part of Satellite . Nobody knew or found out who he was at the time because he never took off his helmet . Every day he used to stare across the waters dividing Satellite and New Domino City . One day , he began constructing a bridge to the city hoping to find Roman . Initially , people thought he was crazy , but came to help him after a while , after seeing his progress and determination . Some people frowned at the idea and forced construction to halt . Rex became wanted by Sector Security and his helpers abandoned the project . Rex ended up cornered by Security one day . Rather than be caught and spend the rest of his life in jail , he rode his Duel Runner along the bridge and flew off to the other end of the sea . No one who saw him jump could figure out if he survived or not , nor what his real identity was , thus they regarded him as a legend and the incomplete bridge was later named Daedalus Bridge . Goodwin managed to survive the jump off the bridge and made his way to the city , but lost his left arm in the process . Eventually Goodwin replaced his arm with a mechanical one . Goodwin managed to make his way to becoming Director of New Domino City and Sector Security , as well as leader of a cell within the secret organization known as Iliaster , with Lazar as his all - purpose assistant . In order to make sure that the Dragon cards fell into the possession of their corresponding Signers , Goodwin released them to the public . Since the original Ener - D Reactor , located in Satellite , was the gateway to the Underworld , Satellite was to become the battlefield . Goodwin , aware of this , made it illegal for residents of Satellite to migrate to the city and refused to complete the Daedalus Bridge , as doing so would have dragged the people of New Domino City into the situation . Goodwin masqueraded his beliefs of class and plutocracy with utilitarianism , and said that everyone must work together to maintain the delicate balance between Satellite and New Domino City . Goodwin continued Ener - D research in New Domino and used it to power the city . Zigzix led the project , but operated under Goodwin ' s strict vigilance to ensure the new Ener - D doesn ' t overload again . Using his influence within the city , Goodwin began to locate the Signers . He found the Satellite resident , Jack Atlas , who had a Mark of the Dragon , and identified him as a Signer . Goodwin organized an escape plan for Jack , and promised him that he would live as a Duel King in New Domino . Jack complied , although it meant turning his back on and stealing from his friends . Jack apparently became Goodwin ' s protegé , but was really used for publicity and a tool in Goodwin ' s plans . Fortune Cup . After witnessing the appearance of the Crimson Dragon during Yusei ' s and Jack ' s Turbo Duel , he revealed his status to Jack as the 360th Star Guardian and informed Jack that he was a prophetical savior called a " Signer " . However , Goodwin concealed the whole truth from Jack . Goodwin believed that the truth would spark Jack ' s fire . Goodwin later arranged the Fortune Cup , in the hopes of finding Signers by inviting participants randomly and inserting his own Dueling assassins who would expose a Signer upon Dueling one . Goodwin was shown to have control of nearly every aspect of the tournament either directly or through Zigzix and Lazar . He also had a large string of backup plans should things not go his way : for example , upon discovering that Leo had substituted for his Signer sister in the tournament , he arranged a " consolation Duel " to in order to expose Luna . Greiger , whose hometown had been destroyed , had been promised reconstruction aid to his hometown depending on how well he preformed in the Fortune Cup . Greiger got misinformed that Goodwin was responsible for the village ' s destruction and after he lost to Yusei , he tried to attack Goodwin , which resulted in a spike from his Duel Runner flying off and Goodwin catching it , stunning Lazar . The spinning spike shreds Goodwin ' s glove and part of his suit revealing he had a mechanical left arm . Goodwin manages to calm down the audience while hiding the mechanical arm , then tells Jack that he had lost his arm in an accident years ago . During the Fortune Cup Final , while the other four Signers were in the premises , he used Roman ' s old arm with the 5th Mark of the Dragon to Summon the Crimson Dragon . ( In the dub , he referred to himself as the Fifth Signer ) . He was unconcerned when Jack lost to Yusei in the final round . Due to the appearance of the Crimson Dragon during the Duel , the public and media couldn ' t see how the Duel had ended . When the media questioned him about it , and stated that the public wasn ' t satisfied by the outcome of the Duel , he was able to avoid telling them the truth by claiming there was a malfuction with the Solid Vision . Dark Signers . Goodwin appeared at the premiere of the film " Atlas Rising " . After assisting at opening event and talking to the people , he tried to leave but was stopped by Angela Raines , who publicly questioned him about Jack being from Satellite . Goodwin and Lazar met Yusei on a bridge to in order to tell the boy " the truth " . Goodwin told Yusei about the 5 , 000 year old battle between the Signers and Dark Signers , how the Earthbound Immortals got sealed in the Nazca Lines and how the Crimson Dragon divided itself into 5 parts , each sealed in a Mark of the Dragon . When Yusei asked him why the battle had begun again , Rex told him about Zero Reverse and how it unleashed negative energy , which was also emitted from the Nazca Lines and now the Dark Signers plan to use the same Ener - D reactor from the Zero Reverse incident to open the door to the Underworld . In order to stop this , the Signers must defeat the Dark Signers . Yusei insisted on evacuating Satellite before this happened . Goodwin refused as the people in New Domino would become victims instead . Yusei angrily figured out that this was why Goodwin isolated Satellite . Goodwin told Yusei he must combine his powers with the other Signers in order to stop the Dark Signers . After Yusei asked who the Fifth Signer was , Goodwin says that he was destined to appear eventually . Goodwin arranged for Yusei to be airdropped into Satellite . Goodwin watched the first Duel between Yusei and Kalin . After Carly Carmine became a Dark Signer , Lazar and Goodwin became aware of her presence and watched her Duel Sayer on a screen , in which they saw the Hummingbird geoglyph appear in the city . They also saw Misty Tredwell Duel around the same time and observe her Lizard geoglyph appear there as well . Rex later invited the Signers to his house to give them more information that concerned the Signers and Dark Signers . He told the Signers how they have been brought together by fate , more about the Dark Signer ' s powers and their use of the " Earthbound Immortal s " . Reluctantly , he told them that a Dark Signer cannot return to their normal self as they were no longer of this world . After the Black fog incident in Satellite , Goodwin arranged for the Signers to return to Satellite to fulfill their mission . Before the Signers left , Yusei asked Goodwin to promise to finish the Daedalus Bridge , once the Dark Signers threat had been eliminated , which Goodwin accepted . Rex met up with Roman and engaged in a Duel , and used his Duel Disk , which folded out of his mechanical arm . Rex lost on purpose , so that was reborn as a Dark Signer . He told Roman that he knew Roman couldn ' t defeat Yusei and if the Dark Signers lost the battle , then another battle would occur in the next 5 , 000 years . In his dying words , he told his brother that he intended to stop the chain of fate by laying waste to the entire world using the King of the Netherworld ' s power . Then , by using the Crimson Dragon ' s power , he would remake the entire world in his image and under his rule . After a while , Crow Hogan found him in an old room . Rex informed Crow a little about the past before cutting him off by turning toward a sliding door . Later Rex returned back to New Domino City and back to the Sky Temple to collect Roman ' s arm . Later , after Akiza failed to seal the Lizard control tower before sundown , the Condor Geoglyph appeared in the sky . Then , the Crimson Dragon appeared once again and guided the Signers to Goodwin . As he revealed to them that he had acquired the powers of both a Signer and a Dark Signer , as Goodwin intended to use the power of both the Crimson Dragon and the Wicked God in order to become the Ultimate God . As the Condor mark on his back showed itself , he then removed Roman ' s preserved arm from the canister and attached it to himself and then declared that a Shadow Turbo Duel would be held within Condor Geoglyph as a ritual to welcome the King of the Netherworld . Yusei , Jack , and Crow accepted the Duel in order to stop the resurrection of the Underworld Ruler . During the Duel , he revealed to them about how and why he became a Dark Signer . Shortly after the Duel began , Goodwin Summoned forth all the birthmarks together to form the Mark of the Dragon on his chest . He revealed the strongest of the Earthbound Immortals , " Wiraqocha Rasca " . He also revealed that he was the stranger from the Daedalus Bridge legend . Ultimately , Rex lost to Yusei when his Earthbound Immortal was destroyed by " Majestic Star Dragon " and the King of the Netherworld was destroyed by the Crimson Dragon . With their defeat , the Dark Signers were revived as their old selves , but Rex and Roman remained absent . Legacy . Even after Goodwin ' s defeat , his presence was still felt throughout certain parts of the series . It was shown that Goodwin had paid off strong Duelists to lose to Jack when Jack was King , with Dragan having been shown to be one of them . Primo compared the plan of the Three Pure Nobles to be similar to Goodwin ' s own , but without harnessing the power of the Crimson Dragon . When Yusei prepared to travel to the Ark Cradle , he prayed that Goodwin would guide him through this trial , and reflected that like Goodwin , he would ride over the unfinished Daedaelus Bridge in the hope of changing the future . Manga biography . The manga was set in an alternate universe than the anime and as such contained different events . Goodwin was still the Director of New Domino City , and worked with Mina Simington and Lazar . Deck . Rex used an Inca Deck , which primarily focused on swarming the field to easily Synchro Summon his " Sun Dragon Inti " and " Moon Dragon Quilla " to being his sun and moon cycle , and also used cards like " Destruct Potion " to force their destruction alongside other benefits , and also allowed one to revive in the process . His Deck was spearheaded by his powerful " Earthbound Immortal Wiraqocha Rasca " which he used alongside cards such as " Passion of Baimasse " , to cover its only weak spot and " Meteor Flare " in an attempt to perform a One Turn Kill .