Yohdel, alias Louis Yodewara, begins as a loyal friend to Bucchake and classmate of Katta Kirifuda. Recognizing Katta’s lineage as Shobu Kirifuda’s brother, Yohdel mentors the reluctant duelist, guiding him to Benchan for deck construction and forming "Team Tensai Katta" during the regional "Triple Dash Victory Tournament." Supplying Katta with a premade deck, the team reaches the finals only to fall to Ukon.

Training under Katsuzo Kirifuda hones Yohdel’s skills, yet defeats by Mimi and Shachihoko follow. His path twists when possessed by Onsen, compelling him to steal the Prin Prin Eternal card. During a forced duel against Bucchake, Yohdel wrests back control, sacrificing victory to break Onsen’s hold.

Later, reborn as "Cipher," he allies with Lucifer, embracing opulence and wielding a Light Civilization deck adorned with golden accessories. Tasked with delivering potent cards to Katta, he endures kidnappings by foes like Gyou. Loyalty anchors him through Lucifer’s conflicts, including the Lucifer World Cup and Dormageddon X battles, where he secures allies’ transport.

Fate intertwines him with Puramai Rei in a marriage tied to his "Cipher" alias—a symbol of zero. This union keeps him from Katta’s wedding, though he attends remotely. Professionally, he ascends to manage Lucifer’s finances.

Yohdel’s deck evolves: Light Civilization foundations merge with Darkness spells. In *Victory V3*, he bonds with Nike, an Exile Creature, crafting a deck around their synergy. Despite these innovations, Katta remains his unconquered rival, underscoring a duelist perpetually adapting yet forever chasing victory.