Kokukirin is a spirit beast that serves as the companion and mount of Bunchuu in the anime Soul Hunter, which is based on the Hoshin Engi manga. This creature resembles a large, bug-like being and functions primarily as a riding beast for its master. Kokukirin is characterized by unwavering loyalty to Bunchuu, often placing itself in harm's way to protect him. Its shell possesses remarkable durability, capable of withstanding attacks from many powerful paopei, the magical implements used by characters in the series. In the story, Kokukirin occupies a supporting role, appearing alongside Bunchuu in his endeavors and participating in battles where its defensive abilities and mobility prove useful. Its bond with Bunchuu is the central relationship that defines its actions, and it interacts with other main characters such as Taikobo during the course of the narrative. Kokukirin does not undergo significant personal development, remaining consistently dedicated and resilient throughout its appearances. Its primary abilities include serving as a resilient mount and providing defensive support through its sturdy shell.