Isono ( manga ) Isono ( " Isono " ) , known as Roland in the English dub of " Yu - Gi - Oh ! The Dark Side of Dimensions " is a character in the " Yu - Gi - Oh ! " manga . He is an employee of KaibaCorp , who served as an official in the Battle City tournament . Biography . Battle City . At Domino Stadium , Isono welcomed people who qualified for the Battle City finals and issued them their I . D . cards , including Marik Ishtar , under the alias " Namu " , Rishid , under the guise of Marik , Seto Kaiba , Katsuya Jonouchi , Yugi Mutou , Mai Kujaku and Ryo Bakura . With the cut off time for the finalists arrivals approaching , he proceeded to disclose the true location of the finals , the Battle Ship blimp . He attempted to stop Yugi and Jonouchi ' s companions from boarding , since they did not have I . D . cards , but Mokuba Kaiba overruled him , while pointing out that Mokuba , himself also did have an I . D . card . With cut off time almost reached , he was about the board the blimp himself and continue the tournament , assuming the eight finalist was not going to show up . However Ishizu Ishtar arrived just in time and he accepted her as the last finalist . One hour after the finalists were shown their rooms on the blimp , Isono instructed them to gather in the central assembly hall , where he unveiled the Ultimate Bingo machine , which was to determine the match - ups for the quarterfinals . Using it he announced Bakura and Yugi as the first pairing . Isono served as referee during the Duel and when Dark Yugi was reluctant to attack the injured Bakura , reminded him of the five - minute time limit Duelists had each turn . After announcing Yugi as the winner , he had the first - aid kit brought out for Bakura , following Mokuba ' s instructions . He reminded Yugi that he was permitted to take one of Bakura ' s cards , per the ante rule , but Yugi was more concerned about Bakura ' s safety . Isono announced the bingo draw for the second quarterfinal , matching Jonouchi and Rishid , still posing as Marik . As the participants shuffled each others Decks , he was flustered by Jonouchi ' s intimidating stare - down at Rishid and instructed him to back down and return to his Dueling position . When Jonouchi and Rishid fell unconscious , he refused access to the Dueling platform for Jonouchi ' s friends , since the Duel was not over . He ruled that the first player to stand up would be the winner , having displayed the greater willingness to continue . He enforced a time limit , after which both would be disqualified , but eventually declared Jonouchi the winner . Isono announced the final bingo draw , which selected Mai Kujaku and Marik Ishtar , now Dark Marik , for the third quarterfinal . He refused allow the Dueling platform to be lowered , when Mai ' s life was in danger . But Jonouchi pushed him aside and tried to operate the controls , despite Isono ' s warning of disqualification . Jonouchi and Dark Yugi both disregarded his orders and climbed into the arena to help Mai . Stunned by the recent events , he forgot to declare Dark Marik the winner , until prompted by Dark Marik , himself . The Dark Side of Dimensions . Before Kaiba departed to his space station , he instructed Isono to plan a Duel exhibition while he was away , so that he could showcase his new Duel Disk when he returned .