Sarutobi is a ninja and bounty hunter tasked with escorting Princess Paffy and her priest companion, balancing roles as their protector and the group’s financial provider. His primary mecha, the dark navy Ryu Ninja Bakuretsumaru, eventually evolves into Ryu Ninja Master Bakuretsumaru, though this transformation lags behind upgrades received by his allies.

Hot-tempered and arrogantly self-assured, he fuels a fierce rivalry with the protagonist, mocking him with disdainful epithets like “Sonic Buffoon.” Their dynamic pits Sarutobi’s pragmatic, results-driven methods against the protagonist’s idealism, sharpening their contrasting approaches to adversity. A vengeful undercurrent defines his persona, aligning with his identity as an avenger, though the roots of this vendetta remain unelaborated.

He clashes with foes such as Galden, a shadow-clad knight, and the Helldragon Clan, technologically superior invaders. Pivotal episodes spotlight his battlefield prowess, including an arc where he reawakens the “Yamikaze Legend” to unleash Bakuretsumaru’s latent power, marking his evolution as a warrior. Though initially at odds with allies like Katze, a shrewd weapons merchant, and her brother Hittel, he gradually carves a place within the group through shared trials.

His story remains anchored to the main series, with no supplemental media delving into his past or future beyond the core narrative. Origins and post-series endeavors stay unexplored, keeping his arc focused on his contributions to the central team.