Banri Shiroishi, a first-year business student, channels his relentless drive to revive his family’s struggling dairy farm into his role as Argonavis’ powerhouse drummer. Pragmatism fuels his musical pursuits, prioritizing financial stability over artistic idealism—a contrast to his bandmates’ passions. Years of childhood taiko practice forged his formidable drumming skills, compensating for his petite frame to secure his place in the group.

His exuberant personality and aversion to waste position him as the band’s spirited mood-maker, though a traffic accident threatens his rhythm when drumsticks slip from his grasp—a physical and symbolic hurdle testing his resolve. This challenge amplifies his tenacity, sharpening his commitment to balancing personal ambitions with the band’s collective aspirations.

Banri anchors the group as both a stabilizing presence and a loyal realist, mediating between practicality and artistic fervor. Joint care for the mischievous puppy Pon-chan mirrors his investment in the band’s camaraderie, blending responsibility with lighthearted support. His arc navigates the friction between monetary goals and the intangible rewards of collaboration, tracing a path where resilience bridges ambition and artistry.