Rintarou Inukai

Rintarou Inukai (犬飼倫太郎, Inukai Rintarō) is No.6 of the Muto-assassination team. Known to have a strong sense of pride, and rather die then getting defeated and left alive. Inukai uses the Buso Renkin "Killer Rabies," two mechanical dogs that are commanded by a dog flute. He claims that anyone not holding the flute will get killed when his dogs are in berserk mode. However, at one point, Gōta used this to his advantage and took Inukai's flute, resulting in Inukai nearly getting killed by his own dogs. He can also imitate a dog's bark. In the anime, he, Maruyama, Busujima, Chitose and Shusui were dispatched to take out Victor, but they were forced to retreat.

His Buso Renkin is Kakugane XCII, Killer Rabies, a pair of mechanical dogs commanded by a dog flute held by Inukai; these dogs have twice the smelling power and ten times the strength and stamina of normal dogs. When in berserk mode, the dogs will kill anyone not holding the flute. Cutting both dogs in half during this mode will not affect them, since with lighter weight they move even faster. The only way to defeat the Buso Renkin is to cut the heads off. In the anime, the dogs were sent to fight Victor, but they proved to have little effect on the giant warrior; one dog was crushed in the neck with Victor's bare hands, and the other was crushed by the gravity force Victor generated with his Buso Renkin, Fatal Attraction. According to the manga data page, Killer Rabies were supposed to be purple-red and purple-blue; however, in the anime, they are portrayed as white dogs with purple tails. Voiced by: Makoto Yasumura

Source: Wikipedia