Bastion Misawa Bastion Misawa , known in Japan as Daichi Misawa , is a highly analytic Duelist who resides in the Ra Yellow dorm at Duel Academy . Bastion is a mathematical genius who covers his cards and the walls of his room with endless numeric formulas , believing that everything in life can be calculated arithmetically . The neglect of his character is a running gag throughout the series in both incarnations . Originally a friend and sometimes rival of Jaden Yuki , Bastion ' s role in the anime slightly decreases as each arc passes , although his role in the manga does not . Personality . Bastion is an intelligent , precise , stern Duelist with a genius - level intellect . His Deck was built with a formula that he made . Design . Appearance . Bastion ' s usual outfit consists of the standard Ra Yellow . His black hair is neatly arranged , with a large portion flushed back and slightly to his left , featuring different layers where the sloping changes direction . He carries an Academy - issued Duel Disk on his left hand . Voice and mannerisms . Despite his protests that such feelings are illogical and irrational , it is implied that Bastion has feelings for several female monster cards seen throughout the series , his primary crush being " White Magician Pikeru " , but it is implied that he is also crushing on other cards and other girls . For example , at the beginning of the Genex Tournament , he couldn ' t attack " Familiar - Possessed - Hiita " because he liked her ; similarly , when a doll named Alice showed up , he wished her to be with him instead of Tyranno Hassleberry . In the dub , Bastion speaks with a British accent . In the Japanese version , Bastion occasionally addresses Jaden as " Ichiban - kun " meaning " Number one " . Etymology . His given name in the Japanese version means " great intellect " , reflecting his Dueling style and character . Biography . Seven Stars . Bastion came in as # 1 in the entry examinations and is generally regarded as the best newcomer student . He and Jaden Yuki first met during the examinations , with Jaden referring to him as " # 2 , " and himself as " # 1 . " After seeing Jaden defeat Dr . Crowler , Bastion himself agrees with these titles . After defeating Chazz Princeton in a public Duel Bastion is offered entrance into Obelisk Blue but declines , saying that he promised himself he would not advance to Obelisk Blue until he was the # 1 Duelist of the freshman class and in order to do so , he would have to defeat Jaden , who he viewed as # 1 . He builds a seventh Deck , seemingly based off his Water Deck which is devoted to sealing certain cards so that an opponent will not be able to Summon most of his or her monsters . Bastion uses the seventh Deck against Jaden , preventing the use of " Polymerization " with " Cursed Seal of the Forbidden Spell " , therefore keeping Jaden from calling forth his stronger monsters but is still defeated when Jaden uses a combination of " Elemental Hero Wildheart " and " Cyclone Boomerang " to destroy his Spell and Trap Card s . Due to his skill Bastion is one of the seven Duelists that receive a Spirit Keys to the Spirit Gate that can unleash the Sacred Beast cards . Bastion only Duels one of the Shadow Riders , Tania . Although Bastion uses his " Magnet Warrior " monsters , which use opposing plus and minus charges to stop his opponent ' s attacks and fuse to become stronger , he loses . Afterward , he is stripped of his free will to a degree and becomes infatuated with Tania . He returns to normal after Jaden defeats her and she runs off , leaving her Shadow Charm behind . Society of Light . At one point during the second year , angered by the fact that he was not considered for entry into the Society of Light , Bastion challenges Sartorius to a Duel in order to prove his strength and disband the Society . Chazz , however , takes Sartorius ' place , and although Bastion has the means of being victorious , Sartorius takes advantage of his self - doubt and desire to be accepted , convincing him to intentionally lose to Chazz and finally join the organization . Following his conversion , Bastion is relegated to the sidelines , watching helplessly as other Society members are given the opportunity to Duel Jaden and convert other school members into their group , while he himself is assigned no such tasks . He tries to show loyalty to the society by bleaching his hair white , but nobody notices him . When the Genex Tournament started , he tried to challenge Prince Ojin to a battle , but Sartorius battles the latter instead . After weeks of such torture , as well as a conversation with Dr . Eisenstein , he becomes " enlightened " about his worth as a Duelist and as a person and leaves the Society of his own accord to pursue his goals . Dimension World . After leaving the Society of Light , Bastion follows Dr . Eisenstein back to his laboratory and becomes his impromptu apprentice , helping him with an experiment in quantum mechanics . However , the experiment goes wrong , and Bastion is flung into the same alternate world that Jaden and his friends , as well as the entire Duel Academy main building , is pulled into after Jaden ' s Duel with Thelonious Viper . There , he wandered the world for an indeterminate amount of time , until he was finally reunited with his friends . When Blair Flannigan is found injured , Bastion offers to help her get the medical attention she needs by locating a submarine he had spotted earlier in his travels , and attempting to use it to get her out of the campus building and to a hospital . After volunteering himself to Jaden and co . ' s mission to rescue Jesse Anderson , who was still trapped in an alternate dimension , Bastion meets up with Tania again , who herself was pulled in from her own dimension . The two wander around to protect the dimension ' s inhabitants . He later comes to inform Jaden about Yubel ' s plan to unite all 12 dimensions together and then urges Jaden to accept The Supreme King because The Supreme King is a part of his soul , and without him , he won ' t have the power to stop Yubel . Darkness . Bastion decides to stay in the alternate dimension with Tania which is where he is presumed to still be . However , among the silhouetted images of Duelists that Nightshroud shows to Jaden is one that strongly resembles Bastion . He was presumably restored after Jaden defeated Nightshroud . Other appearances . In the " Yu - Gi - Oh ! GX " manga , Bastion ' s role is larger than in the anime . He is considered one of the five best Duelists in his class . Decks . Bastion has six Decks in the anime , one for each Attribute , though only his EARTH and WATER Decks are ever seen . All his Decks are based on of scientific formulas and processes , and have various control elements to them . Bastion ' s WATER Deck focuses on " Water Dragon " while his EARTH Deck relies on " Magnet Warrior s " and making monsters " Plus " or " Minus " monsters , which affects which enemy monsters they can attack . Specifically to defeat Jaden Yuki , Bastion builds a 7th Deck off of his WATER Deck , and negates Jaden ' s ability to fuse monsters by using " Cursed Seal of the Forbidden Spell " to forbid the usage of " Polymerization " . In the " Society of Light " arc , Bastion combines all his previous Decks together , but he is again only seen using cards from his EARTH and WATER Decks . Most of his monsters tend to be based off of scientific processes . Water . His Water Deck is a Water Dragon Deck which focuses on Tributing " Hydrogeddon " and " Oxygeddon " using " Bonding - H2O " to Special Summon " Water Dragon " . 7th . Against Jaden Yuki , Bastion plays a Water Dragon / Control Deck , that focuses on countering Jaden ' s Deck by restricting the use of " Polymerization " via " Cursed Seal of the Forbidden Spell " . It is explicitly stated to be a separate Deck from his Water Deck in the Japanese version , which he calls his 7th Deck . No such distinction is made in the dub . Earth . His Earth Deck focuses on the manipulation of plus and minus electronegativity via the " Magnet Warrior s " . Misc . These cards belong to a prototype Deck of Bastion ' s , but most of them were thrown in the water in episode 12 by Chazz Princeton . According to Bastion , this Deck was incomplete , and needed work . It seems to be based on multiple Attribute s .