Jack Atlas operates as a key ally within Yusei Fudo’s inner circle. After Yusei grapples with a nightmare tied to the Zero Reverse tragedy, Jack collaborates with Crow Hogan to stage a spirited Turbo Duel, intending to rally their friend’s morale. The duel is interrupted when Paradox ambushes Yusei, seizing Stardust Dragon and sparking a joint investigation into the theft’s implications.

As historical archives expose contradictions—including Stardust Dragon’s anomalous appearances across timelines—Jack joins the team in dissecting temporal inconsistencies. He recognizes patterns in time-travel mechanics, cautioning that altering past events might fracture their current reality. His self-assured nature emerges during discussions of legendary duelists; he openly acknowledges Yugi Muto’s skill yet lightheartedly ribs the veteran’s signature style.

Throughout the confrontation with Paradox, Jack maintains steadfast solidarity with Yusei and Crow, tackling threats through action-oriented strategies. His contributions emphasize tactical immediacy, favoring decisive maneuvers over protracted debate, while his loyalty and blunt pragmatism reinforce the group’s cohesion during the crisis.