Zundamaru is a perpetually enthusiastic yet underachieving second-rate ninja enrolled at the Iga Ninja School. Bursting with boundless, often misguided zeal, he faces dangerous missions assigned by the school's principal – assignments deliberately intended to eliminate him due to his perceived incompetence. Despite this lethal intent, Zundamaru consistently survives these assassination attempts through sheer dumb luck and frequent distractions, notably encounters with attractive girls during operations. His primary dynamic involves a contentious relationship with Sayuri, a female ninja from the rival Koga school, generating recurring comedic conflict. Zundamaru operates alongside his mission partner, Shakuremaru, confronting adversaries including the Koga faction and other enemies encountered on assignments. His personality embodies classic cartoon protagonist energy, driving comedic situations through zany antics and harebrained schemes. He wears standard ninja attire. His mission targets and adversaries include figures such as the Principal, Chibimaru, Kemeko, Kiririmaru, and historical-inspired characters like Ieyasu Tokugawa, with all confrontations maintaining a comedic, action-oriented tone. Official media documents no significant character evolution or background details beyond his role at the Iga Ninja School.