Gravekeeper's Chief (墓守の長Hakamori no Osa) is a character version of the card "Gravekeeper's Chief" who appears in two episodes of the Yu-Gi-Oh! GX anime.
Gravekeeper's Chief and his tribe lived in a ruins-based area of the Duel Monsters Spirit World. Lyman Banner sent Atticus Rhodes to that dimension as a test. Tapping into the power of Nightshroud, Atticus became the first person to defeat the chief. He was gifted with a one half of the Shadow Charm pendant as a result.[1]
Some time later, Banner repeated the process with Jaden Yuki when he encountered the Gravekeeper's Chief and his men. The Chief took Alexis Rhodes, Syrus Truesdale, Chumley Huffington and Banner himself hostage. They were placed at the bottom of the valley in sarcophagi where their heads are the only parts that are not mummified. Jaden and Winged Kuriboh are found by a group of guards and the Gravekeeper's Chief introduces himself. He declares his intention to execute them all by burying them alive, but agrees to pardon them if Jaden can defeat him in a challenge and he reveals a Deck. He engaged Jaden in a Duel, gaining an early advantage by locking down the Graveyard with "Necrovalley". The sarcophagi would close as Jaden lost Life Points.[2]
Jaden ultimately defeated him using "Elemental Hero Necroshade", earning him the other half of the pendant. The rest of the tribe wanted to punish Jaden and his friends for trespassing despite the Gravekeeper's Chief telling them not to attack only for Jaden and his friends to receive help from Yasmin. The guards part, and the group is allowed to leave, with Yasmin telling them that Winged Kuriboh will be able to lead them out.[1]
In the anime, he plays a "Gravekeeper's" Deck, which focuses on the wide range of abilities available with his "Gravekeeper's" cards, as well as "Necrovalley" which prevents both players from activating cards that interact with the Graveyard.