Jack Atlas is a major character in the anime series Yu-Gi-Oh! 5D's. Known as the 'Master of Faster,' Jack is a top-tier Turbo Duelist and initially serves as an antagonist to the protagonist, Yusei Fudo. He is characterized by his ambitious nature and desire to be the best, often showcasing a competitive spirit. Despite his initial arrogance, Jack undergoes significant character development throughout the series, ultimately becoming a loyal friend and ally to Yusei. His signature card is the powerful 'Red Dragon Archfiend,' which reflects his fiery and determined personality.