Nicknamed hag, she deserves to be married to Zhang Qing. Selling human flesh at Cross Slope and Zhang Qingkai Hotel on Mengzhou Road, specializing in killing people and seizing goods. Wu Song was sent to Mengzhou to pass through Crossslope, and was almost killed by Sun Erniang. Wu Song pretended to be drunk and caught Sun Erniang. Zhang Qing begged for mercy, and Wu Song met Zhang Qing and Sun Erniang. Sun Erniang later followed Zhang Qing to Liangshan, presided over Liangshan Xishan Hotel, welcomed and sent, and was the 103rd hero of Liangshan. When Song Jiang conquered Fang La, Sun Erniang was killed.