The Yin military strategist, he has been protecting the Yin because of a promise he made to his comrade Shushi, a lively young woman he once trained with. Bunchuu has been the Yin's strategist and protector for 300 years and he had 30 emperors under his care. He was a disciple of T-san and became the second strongest under T-san. Determined to protect the Yin Dynasty, he was a formidable enemy. In the anime, he was the first who killed Dakki, after the Yin dynasty had fallen. His only close friend was Hiko, whose death prompted him to render his obsession meaningless and subsequently chose to end his own life.
In the manga, upon his death, his spirit travels back to Choka and he bows one last time to Emperor Chu O. Then, he travels to the Yin burial grounds and sees the spirit of Shuushi, who thanks him for "doing such a great job" with the dynasty. Bunchuu's spirit is seen later in the Houshindai, when he told to his follower Chou Kei to find his own path.
In the anime, Bunchuu does not die. After Dakki is defeated, he flies off on his spiritual beast. When asked where are they going, he answers: "Who knows?"