Ryuji Otogi (manga)

Ryuji Otogi is a character in the Yu-Gi-Oh! manga. This is the original depiction of Ryuji Otogi, known as Duke Devlin in the English anime.

Dungeon Dice Monsters
Ryuji's father, Mr. Clown lost a game to Sugoroku Mutou and raised Ryuji with the intention of seeking revenge. Ryuji was okay with this and agreed to refused to forgive the Mutou family. He planned on taking away everything Sugoroku's grandson, Yugi cared about and invented all kinds of games just to fight Yugi. Ryuji first spotted Yugi at the grand opening to Mr. Clown's game shop, the Black Crown and found it hard to believe he was a super gamer.

At the start of the school term, Ryuji joined Yugi's class. On his first day, he impressed a group of girls with his dice tricks, making Yugi's friend Katsuya Jonouchi jealous. He overhead Jonouchi bragging about his own gaming skills and after pretending to be impressed, offered to play a dice and cup game with him. Ryuji placed a die underneath an upside down cup and bet he could move the die without touching the cup. If he succeeded, Jonouchi would do whatever he wanted for a week and if he failed, he would do whatever Jonouchi wanted for a week. Jonouchi accepted, hoping the humiliate Ryuji and steal the attention he was getting from the girls. He tricked Jonouchi exposing the die, by pretending it had moved into his hand and asking him to pick up the cup to confirm. He then grabbed the die. Having won the bet, he planned on using Jonouchi to tear apart Yugi's friendship.

Dice Pool
With the exception of his black dice, Ryuji used entirely Dragons in Dice Pool, when he played Dungeon Dice Monsters against Yugi.