Zuo Cao is the original owner of the body E6 inhabits. She is a five-year-old girl with a small round face, twin braids, and gloomy, weary eyes that possess an adult-like cold indifference. In the novel's backstory, she was sent to her aunt's house in the city to allow her parents to have a boy due to family planning policies. She was forced into domestic labor from a young age, cooking, washing clothes, and cleaning, and later worked in fields and a factory, with her earnings used by her brother Zuo Dongliang as startup capital. She is portrayed as a exploited background character, a 'blood bag' for her family.
