Ryuji Otogi

Ryuji Otogi (known as Duke Devlin in the 4Kids dub) is the secondary antagonist of the Dungeon Dice Monsters arc in Kazuki Takahashi's manga series Yu-Gi-Oh! and the main antagonist of the Dungeon Dice Monsters arc in the second anime adaptation Yu-Gi-Oh! Duel Monsters. He is Yugi's opponent in the arcs titular game.

Trivia

 * Although he is the main antagonist of the anime's version of the arc in the original manga version of the arc he is the secondary antagonist behind his cruel father.
 * Due to the absence of his father in the anime his goals differ in both the manga and the anime.