: After witnessing Banri’s raw, powerful drumming in a battle at the Submariner café, the group is impressed by his talent. Ren's persistence and Banri’s eventual honesty lead to him joining as the final member.
: Initially perceived as arrogant and money-driven, he is revealed to be a pragmatic "mood maker" who played Taiko drums in his youth. His motivation is deeply tied to his family's debt. Argonavis from BanG Dream! Episode 3
: A young man named Banri Shiroishi offers to join, but the group initially rejects him because he bluntly states his motive is making money to rebuild his family’s failing dairy farm. : After witnessing Banri’s raw, powerful drumming in