Hirutani

Hirutani 「蛭谷」(Diesel Kane in the English version of the Yu-Gi-Oh! Dungeon Dice Monsters video game) is a leader of a gang of teenage thugs from Rintama High School (Gammon High School in DDM) that wield super-powered yo-yos. Hirutani tries to force Jonouchi into his gang by any means necessary. The name, Diesel Kane, stems from a gang member character in West Side Story named "Diesel."

Character biography
In the manga, Hirutani forces Jonouchi to join his gang by threatening to beat up his entire class. Jonouchi doesn't show up to school the next day, and Yugi and his friends find Jonouchi. A thug who is friends with Hirutani hits Yugi, and Jonouchi doesn't say anything, causing Anzu and Honda to insult Jonouchi. When Jonouchi goes to a bar, called "J'Z", with the thugs, Jonouchi hits the thug in retaliation for what he did, causing Hirutani and his thugs to beat up Jonouchi. Jonouchi is taken to a torture chamber where he is beaten. After he kicks a thug in the face while tied up, he is shocked with a stun gun. Yugi finds Jonouchi and tricks Hirutani and his thugs into standing in a puddle of water while a stun gun is lowered into it from the knocked-out thug. Yugi was standing on a tire while the thugs were electrocuted. Yugi managed to rescue Jonouchi.

In a later chapter, Hirutani uses Nezumi to lure Yugi and Jonouchi to his hideout. He then has his thugs try to get Jonouchi to join by slowly strangling Yugi by placing a hook upwards to strangle him with his Millennium Puzzle. Jonouchi is battered with yo-yos while running to save Yugi. After freeing him, Jonouchi takes out Hirutani's thugs by catching their yoyos on Yugi's puzzle and hanging the cords on the same hook, causing the thugs to be pulled by their fingers. Jonouchi and Hirutani engage in a fistfight while Dark Yugi tricks the rest of the gangsters into falling through a roof by punching holes in the roof with their spiked yo-yos. Jonouchi punches Hirutani in the face, but Hirutani then throws glass in Jonouchi's eyes. Jonouchi detects Hirutani trying to place a shard of glass in the back of his neck and punches him off the roof. Hirutani grabs onto a ledge; Jonouchi uses his yo-yo to hit Hirutani's fingers, causing the gangster to fall to the ground. The Toei anime uses the plot structure of a previous chapter combined with the yo-yo games of the second set of chapters where Hirutani is found for the sole Hirutani episode.