Sera Sera ( セラ " Sera " ) , also known by her Neurons avatar Prana ( プラナ " Purana " ) , is a character in " Yu - Gi - Oh ! The Dark Side of Dimensions " and " TRANSCEND GAME " . Appearance . Sera wears a pink dress that partially exposes her shoulders , with an ankh symbol on the middle , and each of her two locks are wrapped with two golden rings . Both her arms and legs also have golden rings on them , and she also wear purple shoes . Her VR avatar , " Prana " , has the form of an adult woman , contrasting her real - world self , who is still a child . Her avatar wears a coat , hood , mask , long gloves , boots and retains the ankh symbol of her regular clothing . In this avatar , she wields a sword - shaped Duel Disk . Biography . History . Sera , her brother , Diva , Mani and other orphans lived with an abusive man , until Shadi Shin arrived , granted them the power of the Prana and killed the man . One day , when Shadi was teaching the kids about the Millennium Items , Dark Bakura murdered Shadi , along with some of the orphans , with Aigami , Sera , and Mani the only survivors . Aigami , Sera and Mani resided with a group of children , in the Prana Realm . Aigami and Sera decided to leave one day and went with a group of children . Mani also left to keep an eye on them . Transcend Game . Sera was a successful applicant for testing KaibaCorp ' s Neurons virtual reality system . She used the avatar Prana , while using the VR system . While on the Crystal Cloud Network , she heard that the Dragon Knight Airborne Brigade had a reputation , so she sought them out and challenged them to a Duel . The guild laughed at the idea of a single person facing the entire guild . However she Summoned her " Duza the Meteor Cubic Vessel " , which due to her high brainwave frequency had an ATK of 8800 Pulse , allowing it to easily destroy the Dragon Knight Airborne Brigade ' s " Cosmic Mineral Dragon Stone Head Dragon " . She then remarked that the guild were not as much as they had been hyped to be , before flying away . Seto Kaiba , who had watched her face the guild , commented that she must have a brainwave frequency that transcends that of a normal person and that she could be dangerous . While he found this captivating , from a business perspective , he could not let it go unchecked , so he took note of her name . Sera removed her Neurons gear afterwards , catching the attention of Kaiba , who was standing on a bridge above the testers . A few weeks later , Sera approached Kaiba in his laboratory , at his house . After overhearing him mention that he would rule his Duel Links world , as King , she commented that he could never become King . Kaiba recognized her from the test session and was impressed that she was able to get inside . Sera claimed to be the test subject whose duty it is to shape his new world . She thanked Kaiba for the creation of Duel Links . She discussed the prospect of an individual with superior consciousness being in the system and the Duel Links potential to grant access to other dimensions , beyond the realm of the living , something she knew Kaiba was interested in . She suddenly disappeared as she talked about Kaiba syncing with this superior consciousness . When an unfamiliar consciousness emerged in the Duel Links world , with all test subjects ' neuro signals being drawn to it , Sera through her avatar Prana , located Kaiba in the Duel Links world . She flew her ship next to Kaiba ' s jet and warned him of the danger he was approaching . She asked if he was prepared to face a world of evil , transcending the boundaries of mortal man . She offered to let him proceed if he could defeat her in a Duel , but that he would die if he lost . Kaiba accepted the Duel . His " Blue - Eyes White Dragon " , with 3000 Pulse ATK , at first seemed no match for her 8800 Pulse ATK " Duza the Meteor Cubic Vessel " . Kaiba controlled his thought frequency , bringing its Pulse to 19900 , destroying " Duza " and defeating Prana . Having lost the Duel , Sera ' s " Prana " avatar disappeared , leaving her in her regular appearance . She was slightly annoyed , as she had liked the style of that avatar . Having made her attempt to stop Kaiba , Sera said that there was now no turning back and accompanied him as they approached an apparition of Atem . However they were logged out when Mokuba Kaiba performed an emergency shutdown on the Duel Links , as Kaiba ' s amplified brain activity put his life in danger . Sera was later approached by Tomo , who asked her what book she was reading . Before she could answer , they were both distracted as Tomo accidentally let his balloon float away . After she resumed reading her book , she was approached by Aigami , who commented that Sera had gotten very close . Aigami returned the balloon to Tomo and said to Sera that Kaiba was not somebody they could easily eliminate . The Dark Side of Dimensions . Sera was in Egypt alongside her brother Aigami and their companion , Mani . She watched from afar as Yugi and his friends reminisce on all that had happened since they first met . She recalled how she and Aigami were orphans in Egypt many years ago , and how they had met Mani . After Aigami ' s Duel with Kaiba , Aigami managed to get two pieces of the Millennium Puzzle , which Kaiba was trying to reassemble , and gave a piece to Sera . She then went to the Kame Game shop , where she showed Yugi the Prana Realm . She disappeared , giving Yugi her piece of the Millennium Puzzle . When Yugi was about to get hit by a car , Sera saved him , and teleported him to safety . She told Yugi that it was his choice whether he should complete the Millennium Puzzle , and requested Yugi to save her brother . Sera later appeared before Aigami and apologized , but still maintained that she made the right decision by giving Yugi a piece of the Puzzle . After Aigami was freed from the influence of the Millennium Ring , she and Aigami parted ways with Mani , on good terms . Deck . Sera used the card " Duza the Meteor Cubic Vessel " .