Isla (pronounced "I-la") is one of the main character's of the book. She is 14 and is Astrina's older sister. Isla loves Astrina (pronounced "A-streen-na" very much and is protective of her. She was bullied by Logan, which hurt her deeply. At the beginning, Isla thinks she is saving her life by working for Alster, but the moment she overhears that she's being tricked, she escapes. She wants to go back to Earth to protect her and Astrina. Although she thinks Earth is safer, she gives in to Astrina's plea to stay so they can save Everthrone. When Isla, Astrina, and Logan reunite, Isla is scared of and angry at Logan. Eventually though, Isla sees that Logan has changed through his actions to help her and Astrina.