Yu - Gi - Oh ! 5D ' s - Ride 051 " Memory . . . ! ! " , known as " Recollection . . . ! ! " in the Japanese version , is the fifty - first chapter of the " Yu - Gi - Oh ! 5D ' s " manga This chapter was first printed October 21 , 2013 in the 12 / 2013 issue of the " V Jump " magazine . Summary . At the Machine Temple , the Skeleton Knight - Roman Goodwin - explains to Yusei that Ish Kiq Goodwin was a sister and foster mother to him and Rex , and she was also the strongest Duel Priestess in history . He remembers returning home one day , asking if it was true that Ish was going to be Duel Priestess for the Festival of Duality . He was surprised to see Ish in her new garb , and stared in wonder . Ish had told him to stop staring , as he was making her blush . Rex commented that it was old news ; Ish was chosen out of a crowd of candidates , and it ' s a great honor . Ish added that she ' d be able to help people , so their big sister would have to do her best . Rex cheekily commented that she meant " their mom " , prompting Ish to flare up , but they continued to laugh . Roman admits that he thought that their happiness would last forever , and then abruptly it was over . Roman and Rex knelt before the Duel Priest s , asking why Ish hadn ' t come home . One of the Priests explained that Ish had fallen victim to the ritual . Rex furiously yelled that Ish didn ' t deserve that , and no - one had told them that the ritual was dangerous . One of the Priests told Rex to watch his tongue , asking why they should bother to explain themselves to a commoner like Rex . Rex started furiously , but Roman was able to calm him down . Another Priest scornfully commented that even if they did explain , Rex and Roman would never understand it since they were born from a trash heap . The Priests explain that they do not wish for the ritual to claim more victims either , so they will turn it into a celebration to ensure peace for the year . A third Priest explains that Ish wanted the Goodwin brothers to become fine Duel Priests , " Diak Ums " , much to Roman ' s surprise . The first Priest states that they will support the brothers out of respect for the wishes of Ish , and tells them to pay attention and learn well . Afterwards , Rex punched a wall angrily , believing the Duel Priests to be making fun of them . But Roman reminded Rex about what Ish said ; at the end of the ritual , the God of the Festival of Duality grants one wish ; any wish . Rex began to see what Roman meant , and Roman explained that if they became " Diak Ums " and survived until the end of the ritual , they could ask the God to return Ish . They though that if Ish wanted them to become Duel Priests , then they ' d do it , they ' d show those jerks , and they ' d win Ish back . Roman recounts that time passed , and at last they were just one step away from making their dream come true . They had become the High Priests of the Northern and Southern Skies , now dressed in their ceremonial armor , with the people who used to look down on them cheering their names . Rex mused that it was finally time , and Roman agreed , though he questioned the necessity of pulling the Duel Priestess into this . Rex asked if Roman was getting cold feet , and Roman protested that it wasn ' t that . Roman explains to Yusei that to make sure the ritual was completed , they ' d forced the Duel Priestess to lose . That Duel Priestess ' s current incarnation is Akiza Izinski . Yusei is surprised that Akiza was a Duel Priestess in her past life . Roman ' s hand begins to shake , as he reflects on the festival ; if only he ' d seen it then , if only he ' d stopped it , that tragedy would never have occurred . He remembers making his way through the Corridor of the Northern Sky on horseback , wondering if Rex made it through the Corridor of the Southern Sky . Then he sees a dark miasma gathering at the top of Seibal , and he realized that it was the power of the sealed Ultimate God . He wonders if they can truly harness such vast power . Then he saw a Duel in progress at the Watchtower : Rex and Ish , both bearing the black sclera of those overtaken by Shadow Miasma , Ish with the cracked skin . Roman galloped towards Rex and Ish , who were both operating machines and armed with weapons . Roman asked why Rex was fighting Ish , but Rex yelled that it couldn ' t possibly be Ish . Ish called the humans filthy with ambition ; she would turn them to rust on her blade . Rex ' s monster shocked Ish , and Rex yelled at her to stop screeching , and he attempted to impale her on his lance . Roman begged him to stop , throwing himself in the way . Both of them were impaled - the scene from the Knight ' s memories that Yusei saw - and Ish asked Roman in surprise why he did that . Roman caresses her face , telling her that he loves her . Rex asked why Roman got in the way ; if they could just complete the ritual they ' d have it made . He heaved the lance away as Ish returned to normal , begging Roman to save Rex , who has also fallen prey to the Ultimate God ' s darkness . She asked him to do so no matter how long it took , as Rex was still their little brother . In the present , Roman states that that is what happened between Rex and him . Ish ' s corpse is interred here at the Machine Temple . The Ultimate God is at the root of it all , and its Shadow power brought about this tragedy . But Yusei and " Stardust Spark Dragon " have souls that cut through the shadows . If they try , perhaps they can save Rex from the shadows . The image of his former human self appears next to the Skeleton Knight as he calls Yusei a " Diak Um " . Yusei points out that Jack is Dueling Goodwin , so if Jack beats him , won ' t that do it ? Roman bows his head , admitting that if it does , then so be it . But Rex is no longer human and he has lived for 5000 years . He doubts that Rex will go so easily . The Machine Temple suddenly begins to collapse , and Roman declares that it will soon be destroyed . He disappears behind the wreckage , bidding Yusei farewell , and admits that it was worth waiting 5000 years for a warrior like him . His spirit , restored to human form , emreges with that of Ish from the wreckage of the Machine Temple , explaining to Ish that he ' s passed on her wishes to the next warrior . Ish smiles , and the two spirits fade away . Looking sadly at the wreckage , Yusei refers to the Skeleton Knight as Roman Goodwin for the first time , stating that he ' ll carve his last wish on his heart , as one who Dueled with him . Featured cards . The following cards appeared in this chapter . Cards in italic debuted here .