Zane Truesdale ( manga ) Zane Truesdale , known as Ryo Marufuji ( 丸藤 亮 , " Marufuji Ryō " ) in the Japanese version , is a character in the " Yu - Gi - Oh ! GX " manga . Biography . He is at the top of the class , and is described as " Number one ranked in practical skills " . His " Kaiser " nickname is retained even in the English edition of the manga . When they were children , Zane gifted Syrus with " Transformation " . He believed that Syrus was too nice to be a Duelist as he cared for his opponents too much . He came to this determination after witnessing Syrus throw a Duel against a friend of his named Masao . Zane competed in the junior leagues when he was a child , alongside Atticus . The two " dominated " the title of Junior Champion . During this time , Zane and Atticus met American Duelist Aster Phoenix . When they departed for Duel Academy , the title would be won by Chazz Princeton . Zane studied abroad in America with Atticus , where he represented Duel Academy well . He returned to Duel Academy months later alongside two American students - David Rabb and Reggie MacKenzie . A tournament was organized , with the winner being permitted to Duel Zane . He witnessed Syrus defeated in a Duel by David , with David coming to the conclusion that if the brother of the Kaiser is that weak , perhaps the Kaiser himself isn ' t as strong as his reputation implied . Syrus defended Zane , telling David not to insult his brother . Zane came to the conclusion that Syrus had done a lot of of growing up when he ' d been away . Syrus made it to the top eight of the tournament , and though he is defeated by Chazz , Zane came to believe that Syrus had matured into a true Duelist . Zane is confronted by Bastion Misawa , as the latter is jealous of Zane ' s closeness to Alexis Rhodes , whom Bastion has a crush on . He would declare his intent to face Zane as " both a Duelist " and " as a man " . Zane told him to win the tournament , as that would be the quickest path to Dueling him . As Zane witnesses Syrus , Chazz , Alexis , Bastion and Jaden Duel in the tournament , he is greatly impressed by how skilled the first - year students are . The eventual winner of the tournament was Chazz , and it was announced that he ' ll face Zane at an arena built into Duel Academy ' s volcano . Chazz appeared to have an early advantage , with Zane calmly countering him . Zane Summons " Cyber Eltanin " with a combination of " Emergency Cyber " and " Born from Draconis " . He defeated Chazz with this creature , with Chazz not even dealing him a single point of damage in return . He did compliment Chazz on the latter ' s skills , however , addressing him as " Junior Champion " . Zane would watch the Tag - Team Duel s between the American and Japanese students with Atticus . Zane witnessed Syrus and Alexis rushing towards the warehouse at the docks , and opted to follow them . He met Midori Hibiki there , who had followed the spirit of " Light and Darkness Dragon " to the same location . He would witness Tragoedia fall to Jaden and Chazz . Years later , he watched Jaden ' s world title match against Koyo Hibiki , while wearing his " Hell Kaiser " outfit from the anime . Deck . Zane plays a Cyber Style Deck . Many of his cards are based on stars , particularly those in the constellation . In this continuity , Zane utilizes a far more defensive strategy than his anime counterpart . He bides his time with cards such as " Cyber Larva " while gathering the components for a winning move .