Udagawa Tomoe is the reliable drummer of the band Afterglow in BanG Dream!. Voiced by Yoko Hikasa, she is depicted as a big sister figure to all, providing support to her teammates. She has a younger sister, Ako Udagawa, who is the drummer of Roselia. Tomoe advises Ako on band matters, emphasizing showing skills over mere words. The Udagawa sisters occasionally spend rare days out together, highlighting their close sibling bond.