Mu Nianci (穆念慈) is a character in The Legend of the Condor Heroes. She is the love interest of the lead antagonist, Yang Kang. Mu Nianci is the foster daughter of Yang Kang's father, Yang Tiexin.
After falling in love with Yang Kang, Mu Nianci would later conceive a child with him. Her son, Yang Guo, would be the main protagonist in The Return of the Condor Heroes, the sequel of The Legend of the Condor Heroes and become one of the new Five Greats at the end of The Return of the Condor Heroes.
Mu Nianci died somewhere between the end of The Legend of the Condor Heroes and the beginning of The Return of the Condor Heroes, leaving her son Yang Guo an orphan until Guo Jing and Huang Rong came upon him several years later and took him back to Peach Blossom Island.