Death Reaver Boranoi I was a Yamatian tree hamster owned by the notorious pirate captain Yousei Kaizoku who trained him to become a ferocious fighter in tree hamster tournaments. He was known for his awful farts and being a general nuisance such as eating Kaizoku's parrot, but despite that Kaizoku still cared for him deeply and mourned the hamster's untimely demise during the Unification of Yamato. Kaizoku eventually got his hands on another tree hamster after the Cataclysm and named him Death Reaver Boranoi II in honour of his earlier pet.