Leon von Schroeder Leon von Schroeder , known in Japan as Leonhart von Schroider is the younger brother of Zigfried von Schroeder . He is a very famous Duelist who uses the alias of " Leon Wilson " when he Duel s . He joins Kaiba ' s KC Grand Championship tournament to help his brother gain revenge on Kaiba Corporation , though he also aspired to Duel Yugi Muto . Design . Appearance . Leon has hazel eyes and dark maroon hair , in contrast to his brother Zigfried ' s pink hair , and ties it with a hairband . His attire consists of a light - blue sleeved school shirt with a cream vest bearing a school insignia , navy - blue shorts , white knee socks , and black dress shoes . In his youth he wore a dark green jacket and shorts , a white shirt underneath with a tie , black socks and brown dress shoes . Personality . Leon is polite and respectful of those around him , but has small doubts about himself when he made it past the first round . Leon likes to keep an optimistic attitude , and this is shown through his Duels by enjoying them , and is very modest in his skills , never one to gloat in his victories . However , during his Duel against Yugi , he became more determined and brutal , now Dueling to help his brother , unaware of his true intentions . He idolizes his brother , yet realizes that Zigfried ' s actions are wrong . Leon is a big fan of Yugi and has admired him since Duelist Kingdom . In a scene removed from the dub , Leon is seen watching Yugi in various tournaments on TV . Leon has wanted to Duel against Yugi since Duelist Kingdom and gains his chance in the finals of the KC Grand Championship . Biography . History . Leon ' s family never paid very much attention to him when he was a kid . They were always focused on preparing Zigfried to take over the company , and they would punish him for distracting Zigfried from his studies . Leon discovered a fondness for fairy tales and wrote a letter to Maximillion Pegasus , requesting that he make fairy tale cards . After building a talent with computers , as well as Dueling , he used these skills to enter tournaments under a false name so his family wouldn ' t find out , until was discovered by Zigfried . Who , rather than being angry or ashamed , was impressed with his brother ' s talents . Recognizing his abilities , he asked his brother to assist him with running their family business , promising him that he would never be alone again . KC Grand Championship . Leon first meets Yugi after a friend of his finished up a Duel against the Duel Machine , where he and the other people in the arena are locked in after Zigfried hacked the controls . He then witnesses Yugi Duel the Duel Machine , using Rick ' s Deck , and winning . Later , during a party held to kick off the KC Grand Championship , he greets Yugi and Joey , sheepishly telling them that he ' s competing too . When Roland introduced him , he explained that Leon was a Dueling prodigy , shocking Yugi and his friends . During the first round of the tournament , he is paired up against Doctor Goat . Tea wishes him good luck , causing him to blush from the encouragement and nodding his head . Although the doctor ' s eccentric behavior was confusing to him , Leon still managed to win , and watched as his two nurse assistants took away on a stretcher . His next Duel would be against Ethan Shark in a overwhelming victory ( as evident he still had 4000 Life Points by the Duel ' s end ) . Zigfried ' s second virus attack , however , would cause the haunted house they were Dueling in to go haywire , creating mass confusion for him and the other Duelists ( as their Dueling grounds were also affected by it ) . He later Duels against Rebecca Hawkins in the semi - finals . Their Duel was a back - and - forth match in the early parts , although Leon ' s Fairy Tale cards proved to be too much for Rebecca . He was able to counter each one of her attacks and strategies , eventually turning her own " Diamond Head Dragon " against her with his " Thorn Princess " , winning the Duel . He tried to cheer her up after she lost , and although she snapped at him , told him to be prepared as there was still a long way to go before the tournament ' s end . When Zigfried is disqualified , he recruits Leon to help him with his plot to destroy KaibaCorp , by activating " Golden Castle of Stromberg " , which will release a computer virus into the system . Leon initially agrees because he is unaware of his brother ' s plan believing that winning at Kaiba ' s own tournament and humiliating him will be enough . During the Duel with Yami Yugi , he eventually comes to his senses and refuses to help Zigfried , but is unable to remove the card from play . Yugi , however , comes up with a strategy to destroy it by turning its own effect against it , while Seto Kaiba works on stopping the virus . Once the " Golden Castle " was destroyed , Yugi would win the Duel using a combination of " Necromancy " , " Diffusion Wave - Motion " , and " Dark Magician " . Afterward , Yugi praised Leon for his courage and strength , which made the latter break down into tears of joy . Even though Zigfried tried to salvage the situation , still thinking his virus did the job , he learns from Kaiba that not only was the virus stopped , but all the data had been completely restored , thereby crushing Zigfried ' s plans . However , Leon comforts him , telling him what he learned form the Duel with Yugi to help motivate his older brother , causing Zigfried to tearfully hug his brother in thanks , restoring their bond . In the dub , Leon made a final appearance in episode 220 , standing at the balcony of his castle , looking up at the sky . In the Japanese ending , Leon was seen with Zigfried , who was seen trying to make a business deal with Maximillion Pegasus . Deck . Leon uses a Fairy Tale Deck , composed of cards that were specially created by Maximillion Pegasus upon Leon ' s request , based on fairy tale creatures ( in the dub , he says that Pegasus felt the same way he did about fairy tales and decided to make the series of his own volition ) . Leon ' s Deck is varied and balanced , with effects ranging from effect negation with " Curse of Thorns " to swarming the field with " Iron Hans " and " Cinderella " . His cards largely lack pure power , with only " Globerman " and " Hexe Trude " being stand - out attackers . Leon circumvents this with monster destruction effects like " Spinning Wheel Spindle " and " Gingerbread House " .