Duke Devlin

Duke Devlin (Ryuji Otogi) is a charismatic, cocky game designer from Yu-Gi-Oh!, creator of Dungeon Dice Monsters, who initially rivals Yugi due to a grudge his father held against Yugi's grandfather, but later softens and becomes an ally, known for his dice-themed accessories, stylish look, and rivalry with Joey Wheeler. He's a skilled strategist and hacker, often seen with his dice and iconic headband, evolving from arrogance to friendship with the main group. (Be whoever you want! Random Voice!)