Within the Fūma ninja clan, Tasuke stands as Fujimaru's first master. He charges Fujimaru with recovering the "Book of the Smoking Dragon"—a collection of scrolls safeguarding potent ninjutsu techniques. When Fujimaru unintentionally ignites one scroll amid an enemy attack, Tasuke severs their bond, disowning him as a "stray dog orphan" and spitting on him to enact the rupture. This expulsion thrusts Fujimaru into solitary action. Later disclosures unveil the destroyed scroll as a counterfeit, preserving the genuine artifact intact. Tasuke exits the narrative permanently after this disownment.