Wataru Matoba, a first-year Literature student, balances bassist and lyricist roles for the band Argonavis. His cautious realism and quiet pessimism contrast sharply with bandmate Yuto Goryo’s optimism, driving Wataru to temper Yuto’s zeal with grounded pragmatism—a strategy rooted in his unresolved rivalry with older brother Kenta Satozuka, whose shadow he yearns to escape.

Raised by a mariner father and a nurse mother often absent due to demanding shifts, Wataru grew up under Kenta’s influence. Initially inspired by his brother’s musical pursuits, he embraced the bass only to nurture simmering resentment over perceived inadequacy, fueling his adulthood determination to outshine Kenta through artistic success.

His name, "Wataru" (航海), etymologically tied to seafaring, echoes his father’s career, while the surname "Matoba" (的場)—"target" and "place"—mirrors his focused resolve. A book enthusiast, he drew from mythology to name the band "Argonavis," invoking the celestial voyage of Argo Navis, which shapes their nautical and starlit aesthetic.

Standing 175 cm with auburn hair and grey eyes, Wataru’s April 22 birthday marks a persona both critical and quietly devoted to his band. His fraught dynamic with Kenta—a tangle of rivalry and unspoken family strain—anchors his emotional complexity, positioning him as Argonavis’ pragmatic counterweight, harmonizing lofty dreams with methodical ambition.