Kurohabaki Yamabiko is a Kai Ken the youngest son and the heir of Kurohabaki Terumune, leader of the Kurohabaki Clan and makes his first appereance in GDW:O.

In GDW:O, Yamabiko was the first biologic son of Kurohabaki Terumune, who declared him his heir and next leader of the Kurohabaki Clan instead of Kurohabaki Masamune, the adopted older brother. The decision made Masamune bitter and he wanted to kill both Yamabiko and Terumune in order to become the leader. Terumune send Yamabiko away to Shikoku with his guardian Kojūrō and Amon, being afraid that Masamune might harm his little brother and, when he tried to return back home, Yamabiko is then attacked by Masamune's assassins, but he is rescued by Orion and the puppies quickly become friends. Yamabiko returns to Shikoku and fights Kamakiri's sons army which attacks his territory. Orion's army comes to help Yamabiko's one and Yamabiko later joins Orion's pack. In the last battle kept in Ohu, Yamabiko is cornered by Masamune, but he is saved by Rigel who jumps in to protect him. Later Masamune slashes his throat, but the puppy survives. After Masamune death, Yamabiko decides to return back to Shikoku.

In TLW, Yamabiko arrives in the Akame Mountains with some of his followers to greet Orion after six months.