Demelza Carne is a fictional character from the historical novel series Poldark, written by Winston Graham. She is introduced in the second book of the series, "Demelza," and becomes the love interest of the main character, Ross Poldark. Demelza is depicted as a strong and resilient woman, originally a poor miner's daughter, who rises to prominence through her relationship with Ross. Throughout the series, Demelza evolves from a humble background to a key figure in the Poldark family. Her character embodies themes of love, loyalty, and social change in 18th-century Cornwall, where the story is set.