Muses of Music

From Barbie and the Diamond Castle. Three Greek goddesses who are the protectors and inventors of all music. Dori (blue), Phaedra (purple), and Melody (red) are the members. They used to have a member named Lydia, but she was actually a jealous witch. She betrayed them, ran away, and became a hermit in a secret cavern she found. She came back to get the titular castle for herself and make the world miserable with her evil music. The Muses hid the castle and as a result of attempting at a talk with Lydia, got turned into statues, kidnapped, and brought back to the cavern, where they were on display as Lydia's hostages for years. Melody manages to escape by trapping herself in a mirror and enlists Liana and Alexa to help save her friends and the world.

Dori plays a harp, Phaedra plays a traditional Greek guitar, and Melody played a whistle, but was eventually given a flute.