Li Meimei is a member of Surgical Team Three who was selected as Gu Siqing's assistant. She is three years older than Gu Siqing but treats her with great respect. She is described as quiet, focused, and never gossips. She is like an invisible person at the hospital. After being hypnotized by Gu Siqing, she becomes deeply loyal and trustworthy, keeping Gu Siqing's secret about the spatial world. She is excited to learn from Gu Siqing and hopes to one day perform surgeries on her own. She was chosen based on her answers to psychological questions that Gu Siqing prepared. During the surgery, she was nervous but followed Gu Siqing's instructions carefully.