Arabella Skydancer is the Queen of the Unicorns. She lives in Luster, often residing in her court. Arabella is very weak and nearing her death. She is nearly transparent, which is what happens to unicorns who are close to dying. Arabella requests that Cara Hunter travel back to earth in order to bring her grandmother, Ivy Morris, back to Luster. The Queen tells Cara that it is time. Arabella has several of her subjects in Luster help Cara on her quest back to earth. When Cara finds her grandmother trapped in the magical Rainbow Prison, Arabella greets them there in spirit form. Arabella tells them that Ivy Morris is actually a unicorn, the Queen's long-lost granddaughter Flickerfoot to be exact. Flickerfoot is the true heir to the throne of Luster. Once Ivy/Flickerfoot has returned to Luster, the Queen knows her world is in safe hands and she breathes her final breath.