Demelza Poldark is a fictional character from the historical novel series written by Winston Graham, known as the Poldark series. She is introduced as a young, impoverished girl who becomes the wife of the protagonist, Ross Poldark. Demelza's character evolves throughout the series, showcasing her resilience and strength as she navigates the challenges of 18th-century Cornwall. In the story, Demelza plays a crucial role in supporting Ross in his endeavors, both personal and professional. Her background as a miner's daughter influences her perspective on social issues, and she often advocates for the rights of the working class. Demelza's character is celebrated for her loyalty, courage, and determination.