Kurokirimaru is a greyish-brown Kai-Ken, with dark markings around his eyes and stripes and spots across his body. His chest, legs, belly and tail are lighter. He has yellow-coloured eyes with big irises.
As a Kai-Ken, he is quite hot-blooded and doesn't have very much of patience. He often thinks less of others.
Ginga Densetsu Weed: Orion
He travels the alps with his brothers as an assassin, killing anyone not willing to join the Kurohabaki clan. Kurokirimaru also works as a chief vassal, and together with his siblings, he works to recruit dogs, such as the Sanada clan.
Along with his brothers, he has killed Masashige and many others. He fights Orion and the Ohu army, losing his eye and tail in the process before being washed away by the strong current of a flood. Both he and Tsumuji drowned.