Name: Thunder
Japanese name: サンダー
Sex: Male
Breed: Dobermann

Thunder is one of Hougen's minions and works as an assassin. Together with his brother Lecter, he has been given the task to kill both Weed and Kyoushiro. Thunder takes the puppy Teru as a hostage, but Weed jumps at him and they fight fiercely. Thunder loses the fight and disappears together with his brother.

He is not seen again in the series.