In Studio Ghibli’s Castle in the Sky, the girl who possesses a magical crystal necklace is Sheeta.
Sheeta is the film’s female protagonist and a descendant of the people who once lived in Laputa, the legendary floating castle. Her crystal pendant, called an aetherium crystal in some descriptions, helps reveal her connection to Laputa and becomes central to the story’s conflict.
Sheeta first appears after falling from an airship during an attack by government agent Muska and his forces. The pendant mysteriously slows her fall, allowing Pazu to find and rescue her. Together, they become involved in a race involving pirates, the military and Muska, all seeking Laputa’s technology.
Sheeta is sometimes confused with Dola, the air-pirate captain, or with Pazu, the boy who helps her. Pazu is the film’s other young lead, but Sheeta is the character whose royal heritage and crystal pendant connect directly to Laputa.