The Prismriver Sisters are a group of characters from Touhou Project, debuting in the seventh game, Perfect Cherry Blossom. Lunasa, Merlin and Lyrica are collectively called the "Prismriver Ensemble" and perform at parties and festivals. Although at first sight their instruments, Lunasa with the violin, Merlin with the trumpet, and Lyrica with the keyboard, seem scattered and disconnected, they still perform magnificent music.