Sora Shiunin ( manga ) Sora Shiunin is a character appearing in the " Yu - Gi - Oh ! ARC - V " manga . He is introduced as an agent of Reiji Akaba with a mission to defeat Phantom . However , after losing to Yuya and Yuri it is revealed that he is actually working for Eve . Personality . Sora is shown to be a cunning and ruthless individual who will do anything to win , as shown when he made up a sob story about his sister who was kidnapped by Reiji . He is also somewhat of a sadist , setting the solid vision system to triple the pain someone feels when they take damage in an attempt to hurt Yuya . He also hates when people show mercy to him . This is shown when Yuya tried to reduce Sora ' s life points to exactly 0 so as to not cause him more pain than he has to . When this happened , Sora was furious that Yuya was attempting to show mercy and used a trap card to double the damage ( which thanks to Sora ' s tampering with the system effectively increased it by a factor of 6 ) . Despite having no hesitation to use Miu to deceive his enemy , Sora seems to genuinely cares for his sister as he said that he will never forget about her when she appeared in his dream . Biography . A month prior , Sora was approached by Reiji to serve as a member of a dueling squad he is assembling to hunt down the rogue Duelist with as " Phantom " . But in truth , his memories altered , Sora was actually sent by Eve to keep tabs on Reiji as a sleeper agent . Once the Leo Corporation staff detected Phantom after he hacked into their systems , designated # 3 , Sora with deployed with Shingo Sawatari , and Shun Kurosaki in helicopters to surround him all sides . While given the task to catch Phantom if he should escape by air , Sora questioned Reiji ' s reason of sending so many people after a mere hacker . After their quarry escaped , learning the Phantom ' s real name as Yuya Sakaki , Sora became more suspicious of Reiji when he learned that Yuya used his time hacking into Leo Corp ' s Solid Vision system to help people . Evenually , Sora ' s curiosity gets the best of him as decides to access the supercomputer in Leo Corp after reach a dead end . Sora formulates a means by using special gloves and glasses with Reiji ' s DNA to enter the room , marveling at the computer ' s size while learning that Reiji allowed him to enter . After Reiji agrees to sake Sora ' s curiosity , the boy begins by asking who Yuya is and Reiji ' s reasons of pursing Yuya . Reiji explains to Sora , explaining it to be the computer ' s analysis , that Yuya is a threat to the world . Sora then questions Reiji himself , asking the nature of Pendulum Summon and where he came from . Reiji refuses to answer any further , telling Sora to get his remaining answers from Yuya himself . Reiji then leaves Sora with three prototype Pendulum Monster cards and the name of what Yuya is searching for : Genesis Omega Dragon . Leaking out the G . O . D card , Sora lured Yuya to the Physical Information Company where Solid Vision is being researched . As Sora expected , Yuya and Yuto , along with Yuzu , took the bait and sealed them all in so he can duel Yuya . After a brief banter , Yuya not answering his questions while admitting to the youth that he knows nothing each about the G . O . D card , Sora commences an Action Duel with Candy Park as their setting . Yuya has the advantage at first until he finds a photo of Sora with a younger girl , causing the boy to cry as he reveals her to his younger sister Miu Shiunin . Sora then spins off a lie that Reiji is holding Miu hostage and that he must beat Yuya to ensure her safety . This gives Sora the edge as Yuya becomes utterly conflicted , forcing Yuri to take over . Yuri proceeds to mercilessly attack the boy while convincing Yuya that Sora was playing him . Once Yuri tore up the photo to prove his point , smiling maliciously as Yuri triggered his trap so he can get an Action Card , Sora confesses that he lied while using his new Pendulum Monsters to turn the tables and reduce his opponent ' s life points to 100 . Sora then adds that he also rigged the dueling system to inflict three times the normal amount of pain . Yuya manages to convince Yuri to switch back , telling Sora that he will not allow him to abuse Pendulum Summon to harm others . Yuya proceeds to defeat Sora in a way that destroys his " Frightfur Dare - Devil " while reducing his Life Points . When Sora realizes Yuya is using roundabout tactics to beat him without even suffering once , the boy becomes utterly enraged at what he considered an act of pity . Sora retaliates by using the two Action Cards he obtained to self - inflict 2000 points of damage , which would cause the dueling field to self - destruct at the possible cost of Sora ' s life . However , having watched the duel unfold , Eve sends Ren to quickly retrieve Sora so he would quickly receive medical treatment . Waking after a dream of visiting Miu and assuring his sister that he not forget her while making a new world for them to live in , his memories restored , Sora finds Isaac by his side and informed him of how he returned to their group . While Sora helped Ren in tracking down Yuya and Reiji after they fell off the grid , it is revealed that Sora has no memory of his life before aligning with Eve . Sora is next seen accompying Isaac after noticing someone is spying on Ren ' s duel with Yuya . Finding out its Reiji and that he ' s currently watching the duel from a satellite , Sora is impressed with Issac calling him a genius which surprises Sora as Issac considers himself a genius as well . Although he offered to duel Reiji , Isaac decided to take care of the matter himself . After Ren is defeated , Sora is watching him recover from his duel . Sora is planning to duel Yuya once again and states that things will be different , now that he has his memories back . Relationships . Miu Shiunin . Despite his memory loss , Miu was the only person that Sora remembered from his past and is his sole motivation in creating a new world for them to be together on . But Sora had used his feelings for Miu to play on the sympathy of others . Yuya Sakaki . Sora considers Yuya an interesting adversity when first seeing him in action and making attempts to study him . It was only at the end of their duel , attempting to play on Yuya ' s feelings before revealing his true nature , that Sora grew to despise Yuya for showing him mercy . Reiji Akaba . Out of Reiji ' s subordinates , Sora was the only one who truly questioned his reasons of pursuing Yuya . In time , when he finally confronted Reiji about Yuya , Sora was one of the few people to realize some inaccuracies about Reiji ' s sudden appearance in Maiami City . It would later turn out that Sora was sent by Eve as a sleeper agent to spy on Reiji . Shingo Sawatari and Shun Kurosaki . While the three of them were recruited by Reiji to catch Yuya , Sora considered Shingo to be all talk and found Shun too focused on his ideology - based vendetta against Yuya to have a descent conversation with . Deck . Brainwashed . Like his anime counterpart , Sora initially uses a " Fluffal " / " Edge Imp " Deck focused on Fusion Summon tactics while he was working for Reiji . During his Duel against Yuya , he gains two Pendulum Monster prototypes from Reiji which he includes in his Deck . Real . After regaining his memories and rejoining Eve , Sora switches to a " Frightfur " - centered Deck , with a heavy presence of Pendulum Monster s .