Jack Atlas is one of the main characters from the anime series, Yu-Gi-Oh! 5D's. He is also one of the signers, who carries the wings of the Crimson Dragon and the current wielder of one of the Signer Dragons, Red Dragon Archfiend (in the original, Red Daemons Dragon). He is a childhood friend and rival of Yusei Fudo and a friend of fellow Signer, Crow Hogan. Originally a bitter rival to his former friend, Yusei, his defeat and realization of the path he had taken, made Jack realize the error of his fame-seeking ways and resolves to be a better duelist as well as being a better friend. He now resolves to help his friends against the growing battle of enemies in the later arcs such as Yliaster.
He is voiced by Takanori Hoshino in the Japanese version and Ted Lewis in the English version. Jack returns in Arc-V as an alternate universe version of the same character.