Obelisk Force Obelisk Force ( オベリスク ・ フォース " Oberisuku Fōsu " ) is an elite group of Duel Soldiers with the highest rank at Duel Academy in " Yu - Gi - Oh ! ARC - V " , all of whom answer directly to the Professor . All of its members wear blue uniforms and helmets designed after " Obelisk the Tormentor " . Their rank is based on the Obelisk Blue rank from " Yu - Gi - Oh ! GX " . Biography . History . Three years ago , Leo Akaba , the Professor of Duel Academy , and several Obelisk Force members caught Celina and Declan trying to escape . They captured Celina and took her away as per Leo ' s orders , then placed an interdimensional teleportation device on Declan ' s wrist , which sent him back to the Standard Dimension from whence he came . Arc League Championship . When Celina appeared in the Standard Dimension , she eventually warned Declan that the Obelisk Force would come to pursue her . Therefore , Declan organized the third round of the Junior Arc League Championship into a city - wide Battle Royal . As Declan expected , Obelisk Force eventually interfered , as three Duel Soldiers captured Ashley , Bram and Carl , sealing them in cards . This was witnessed by Yuya Sakaki , who then fell into a state of rage and challenged them . Despite the Obelisk Force members burning Yuya repeatedly , the boy appeared unfazed . Six more appeared before Celina , but were intercepted by the Senior participants of the ALCS . Meanwhile , Yuya swiftly defeated the three Obelisk Force members with the newly created " Odd - Eyes Rebellion Dragon " . When Sun Shadow returned to the Volcano Area , three of the Obelisk Force members had left , with the remaining three defeating all of the Senior Class Duelists , sealing them in cards , save for Kev Ravenwood , who was rescued by Yugo , who had been warped to Standard a little while earlier . Yugo defeated all three Obelisk Force members at once by turning their own card effects against them . Three more Obelisk Force members surrounded Zuzu Boyle , disguised as Celina at the time , but Yuri appeared and dismissed them to assist Dennis McField . These three soldiers then cornered Celina , Shay , and Moon Shadow in the Volcano Area . They pushed Celina and Moon Shadow into a corner until Reed and Trout joined the Duel . Though the fresh ' partners ' were able to inflict decent damage to the trio , they were defeated and sealed into cards too . Before Moon Shadow would befall the same fate , Sylvio arrives and saves him with an Action Card . Sylvio ' s participation fails to change the tide of the duel . The tables turn when Gong joins in and passes Sylvio ' s Pendulum Monsters to Shay , who then Pendulum - Xyz Summon ed " Raidraptor - Revolution Falcon " to win the Duel , eradicating the Obelisk Force members who stormed the Battle Royale . Friendship Cup Finals . After hearing Dennis ' report , Leo gave Barrett a new mission to go to the Synchro Dimension with the Obelisk Force and Yuri to capture Zuzu and Celina . Near the end of the Duel between Crow and Yuya , Sora , Sector Security , Declan and Crow noticed several gliders with searchlights defined to be the Obelisk Force . Once landed , Obelisk Force split up into groups of three , searching for Zuzu and Celina . Those who were to find either of them would alert the others with a red flare . Celina , still incapacitated from Security ' s attempt to take her and with Moon Shadow and Riley Akaba , was found rather quickly and a flare was lit , slowly drawing the Obelisk Force to her location . Several members then entered duels with Riley , with all of them ending up defeated by the young boy . Others approached the High Council ' s building , which was under siege by Security as well . However , Sergey Volkov intercepted them , defeating several members , much like Riley did . Around the same time , another trio found themselves halted by Moon Shadow whom they quickly overpowered with their numbers . They held the upperhand until Sora joined the duel on Moon Shadow ' s side , much to their surprise . This trio was then defeated after Sora , with help from Moon Shadow , destroyed their " Hound Dogs " and turned them against their masters . All of the defeated Obelisk Force members were recalled to Duel Academy near - instantly . Riley defeated another group , but at this point was too tired continue dealing with their reinforcements . The young boy then started panicking , recalling his traumatic memories . Before the Obelisk Force could take profit from his situation , Yuya Sakaki arrived to rescue him and Celina . Together , Yuya and Riley defeated another trio before Barrett arrived with three more and challenged Yuya . While they were dueling , the next three members went after a still panicking Riley . This trio was then attacked by Sora ' s monsters and sent back to Duel Academy . Another trio then appeared , led by Yuri . Incapacitating Sora with a " Hunting Hound " blocking his Duel Disk , the trio restrained the traitorous Sora while Yuri started a Duel with Yugo , who appeared at the scene , as well . While watching the two Duels , the three members wondered what the distortion in the sky was after the Four Dimension Dragons appear on the field . They also call out to Yuri who started to act strange , but when Zuzu arrived , her bracelet teleported him and Yugo away . When Barrett , defeated by the newly arrived Sergey Volkov , took Celina with him at the last moment before retreating to the Fusion Dimension , the remaining three members retreated , seeing no possibilities to fulfill their mission without their commanders Barrett and Yuri in the current situation . Heartland City . Under the Professor ' s orders , the Obelisk Force arrived in Heartland and told Mamoru that they will eliminate the Lancers . Three members found the Lancers and Dueled Yuya and Shay . They attempted to defeat Yuya before his turn started but he used " Big Escape " to end the Battle phase . Once they Fusion Summon ed " Chaos Ancient Gear Giant " , it ' s shockwave caused a building to collapse that took Shay out of the Duel after being hit by debris while saving Sayaka . They have " Chaos Giants " attack Yuya but before they can defeat him , Kite activated " Quick Guard " saving him . Kite quickly brought out " Galaxy - Eyes Cipher Dragon " and defeated them with his monster ' s effect , " Cipher Diffusion " and " Cipher Interference " . The three members was about to be sealed them into cards by Kite , but he left them alone and decided to approach Yuya and the others . Deck . All Obelisk Force members use " Ancient Gear " Decks . Their strategy relies on using " Ancient Gear Hunting Hound " to deal effect damage , and Fusion Monster s using " Ancient Gear Hunting Hound " as a Fusion Material to destroy the opponent ' s field while dealing effect damage when the opponent ' s monsters are destroyed . They are heavily reliant on Battle Royal rules , as they often defeat their opponents not with power but through sheer numbers with multiple members attack ing the same opponent at once , typically in groups of three . They further take advantage of Dueling as a team with the same Deck s by using multiple cards to revive their team members ' defeated " Hunting Hounds " and their Fusioned forms to repeatedly use them as Fusion Materials to Fusion Summon more powerful " Hunting Hound " monsters and ultimately bring their ace , " Chaos Ancient Gear Giant " .