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Villains Wiki

Gansley known in Japan as Konosuke Oshita, is the leader and founder of the Big Five as well an employee of KaibaCorp under Gozaburo Kaiba. He is partially bald due to age and is an antagonist in Yu-Gi-Oh!.

He was voiced by Nobuyuki Saitou in Japanese and Marc Thompson in English.


Gansley's business career began with a lemonade stand that he stole from his neighbor. He soon became the biggest lemonade distributor and then started working for Gozaburo Kaiba at Kaiba Corp. With the other four members of the Big Five, Gansley conspired with Kaiba to take over Kaiba Corp and overthrow Gozaburo. Their plan succeeded but Kaiba betrayed them so when Pegasus J. Crawford attempted to take over Kaiba Corp, the Big Five joined forces with him to help him. After Pegasus was defeated by Yugi in a duel, Kaiba fired the Big Five, but they trapped him in his own virtual world and attempted to sacrifice him to the lava pit to awaken the Five Headed Dragon. When Yugi Muto, Joey Wheeler, Mai Valentine and Mokuba Kaiba entered the game, the Big Five summoned the Five Headed Dragon themselves. Gansley controlled its center head and killed Joey, Mai and Mokuba (from which they were later revived), but when Yugi and Seto combined their monsters to destroy the Five Headed Dragon, the Big Five were imprisoned in the virtual world.

They were there so long their bodies were destroyed til they found Noah Kaiba and entered his virtual world. They agreed to defeat Yugi, Seto Kaiba and the others as they needed to steal their bodies to escape.

Gansley took the form of Deepsea Warrior and dueled Yugi. His deck is water themed, and he was able to sacrifice two monsters to create a barrier to reflect any of Yugi's attacks back at him. However, with Kuriboh as his deck master (though Yugi intended to choose the Dark Magician), he was able to attack Gansley directly and defeat him.

Gansley was digitized, but not destroyed. He later returned alongside his defeated comrades Crump, Johnson and Lector, attempting to steal the bodies of Joey, Serenity Wheeler and Duke Devlin. Gansley broke up a fight between Crump and Lector before Noah recalled them, as they had not won the bodies in a duel.

Noah imprisoning the Big Five.

Eventually they all entered Tristan Taylor's body, which had been stolen by Nesbitt. They dueled together against Yugi and Joey, rotating around. He was only dueling for one turn before Crump took over. Yugi and Joey defeated the Big Five. They attempted to steal the gang's bodies again but Noah sent them back to his room. They begged him for another chance but he gave them no more chances and deleted/killed them.

In the 4Kids English dub, Noah imprisoned them each in a different corner of the virtual world. Gansley was killed along with Noah, Gozaburo and the other members of the Big Five when Noah caused a satellite attack that destroyed the fortress that the virtual world was stationed in, deleting the virtual world and anyone in it.


As a businessman, Gansley knows many business strategies but is quite unethical in his business career as he would fire his workers for no reason and began his business career by stealing a lemonade stand from his neighbor. He also seems to be one of the better duelists of the Big Five, as he came close to defeating Yugi, apparently having analyzed every aspect of the duel but underestimated Kuriboh which led to his downfall.


  • Gansley and Johnson are the two members of the Big Five whose vendettas toward Seto Kaiba are never revealed (though given the fact that he was in charge of business strategies, it may be because he was simply tired of doing things differently than he was used to).


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Gansley | Crump | Johnson | Nesbitt | Lector

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Video Games
Scott Irvine