Bai Ruanruan's cousin and the heroine of the novel within the story. Their mothers are identical twin sisters, so the two cousins look very similar. Gu Zhenxi's father is illiterate while Bai Ruanruan's father is an intellectual. Gu Zhenxi has hated Bai Ruanruan since childhood because everyone praised Bai Ruanruan. She stole Bai Ruanruan's identity letter and impersonated her at the Youth League Office to sign up for the countryside. She also took away Bai Ruanruan's grandmother's relic, a space necklace. She later accidentally injured herself and activated the space. She is also the suspected real-world author of the novel. She has a fiancé who she claims Bai Ruanruan snatched away.
