Marnie's daughter is a character from the animated film Marnie's Daughter, directed by Hiromasa Yonebayashi. The story revolves around a young girl named Anna Sasaki, who discovers a mysterious friend named Marnie while staying at her relatives' home in a coastal town. Throughout the film, Anna learns about friendship, identity, and the importance of connecting with others. The narrative explores themes of loneliness and self-discovery, as Anna uncovers the secrets of Marnie's past and their intertwined fates.