Shibaraku Tsurugibe serves as a central figure in the adventure narrative, consistently appearing as a core member of the protagonist's group. His physical appearance features spiky brown hair, a prominent nose, thick eyebrows, and a thin, elongated mustache, complemented by a notably large face and chin often likened to a hippopotamus. This resemblance invites comedic teasing from characters like Himiko. He wears a red vest with two black-ringed yellow circles, a navy blue ronin-style outfit, straw sandals, and a white belt bearing a golden 'N'. Bandages wrap both his wrists, and he routinely carries a katana and wakizashi.

Shibaraku's personality blends resolute self-assurance with overt buffoonery. He projects unwavering confidence in his identity as an invincible swordsman, making exaggerated declarations of prowess. This serious front frequently clashes with his foolish or comedic actions, establishing him as a source of humor. His chagrin over remarks about his hippo-like features amplifies this comedic role.

As a wandering swordsman, Shibaraku joins the protagonist early in the quest to save Soukaizan. He actively participates in battles and problem-solving alongside core group members. When encountering a city with dangerously hot surfaces, he devises stone sandals for safe traversal. His intervention proves crucial during an ambush by American football-themed adversaries. He remains a constant presence throughout the documented progression across Soukaizan's tiers.

In combat, Shibaraku demonstrates ingenuity alongside swordsmanship. Facing multiple football-themed Mashin enemies, he employs environmental advantages or clever tricks to gain tactical advantages, adapting his approach to reflect thematic challenges like football-inspired strategies.

Culturally, Shibaraku embodies the samurai archetype within the trio dynamic. Alongside Wataru—representing the ancient Watari clan tied to dragons and magatama—and Himiko—symbolizing ninja traditions—his demeanor and weaponry solidify his role as the symbolic warrior channeling bushido spirit and samurai heritage.