Illegitimate son of Ren Second Uncle, about twelve or thirteen years old, thin and frail with dull and lifeless eyes. His mother was a maid who was forcibly violated by Second Uncle while drunk. She died from severe bleeding after childbirth without seeing her child. Ren Yimu was abused by Second Aunt and treated like a servant. He had pretended to be foolish all these years to survive. On the night the Ren sisters were burned, he tried desperately to stop Ren Yilin from setting the fire and was beaten brutally, but kept rushing into the flames to save them. He eventually died in the fire in the original timeline. Ren Jingshu saved him in this timeline, and he revealed that his mother was killed by Second Uncle's family, not died from childbirth.
