Матоба Ватару

A first-year literature university student. He is the bassist for the band Argonavis.

His father was a mariner, and his mother was also often absent, so he spent much of his childhood together with his older brother. From his brother being in a band, he got interested in the bass. With his more cautious personality, he often finds the negatives to Yuuto Goryou's attempts to be positive. And yet, it's because he wants the band to be a success. He's an essential part of Argonavis on Yuuto's voyage.

(Source: BanG Dream! Wiki)