Wei Chi's younger sister, a naive sixteen-year-old girl dressed in light pink with delicate pearl flowers in her hair. She has rosy cheeks and a delicate face that becomes even more charming when she smiles at her brother's success. She is resentful and complains about Jiang Lanyue in front of everyone, calling her out for making the family wait. When the neighbors turn against her family after Jiang Lanyue reveals the truth about the dowry, Wei Wan'er cannot bear the relentless criticism and insults, covers her face, and leaves weeping.
