Mutsumi Wakaba is a supporting character in the 'BanG Dream!' multimedia franchise. She is known for her calm and gentle demeanor, and is a member of the band Morfonica, where she plays the bass guitar. Mutsumi is depicted as a reliable and mature presence who supports her friends and bandmates. Her quiet strength and caring personality make her a valued member of the group, and she often helps resolve conflicts and encourages her peers to do their best.