Banri Shiroishi, a first-year business student, channels relentless pragmatism and financial savvy honed by his family’s debt-ridden Hokkaido dairy farm. Determined to revive their legacy, he harnesses childhood taiko drumming skills to join Argonavis as their powerhouse drummer, his compact frame belying a ferocious rhythmic intensity that secured his spot. Thrifty yet exuberant, he balances penny-pinching discipline with contagious enthusiasm, rallying the band as both mood-maker and strategic opportunist. Relocating to Tokyo, he enrolls in Kamogawa Music College’s Business Faculty, merging fiscal ambition with musical drive to forge economic independence. With sunlit blonde hair and piercing golden eyes, his dynamic stage presence echoes the symbolism of his name—"ten thousand nautical miles"—embodying unwavering resolve to navigate hardship through rhythm and resilience.