One of Bandit Keith's former henchmen. In the Duelist Kingdom tournament, they meet up bandit Keith, who agrees to coach them through the tournament so all four of them will advance to the Pegasus Castle. While helping them win Duels the first day of the tournament for their Star Chips. When Keith finds out about Mutou Yugi, Jonouchi Katsuya and the rest of the gang, he plans to get in theri way and eliminate them.
When Jonouchi runs away from the gang to urinate, Satake beats him unconscious, and he wakes up in the cave with a Battle Box (Dueling Arena in the Duel Monsters anime), complete with a Graveyard Field. Ghost Kotsuzuka challenges Jonouchi to a Duel that he tricks him into thinking he must accept.
Kotsuzuka has the upper hand; however, Jonouchi wins the Duel. Keith then locks the gang in, double crosses his three companions, knocking them unconscious and enters the finals, after taking Takaido and Satake's five Star Chips by force.
In the Duel Monsters anime, Kotsuzuka, Takaido and Satake make one additional appearance in the Battle City arc where they reside in a nearby cemetery and trick people into giving up their Puzzle Cards. However, Dark Bakura is not intimidated by the their act and challenges them to a Duel in which the winner gets all the Puzzle Cards, and thus goes directly to the Battle City Finals. Bakura wins in just a few moves, and then banishes them to Hell (the Shadow Realm in the English dub).
Content compiled by AnimeList.moe from publicly available sources.