Gu Dasao was one of the three female characters among the Liangshan heroes and was married to Sun Xin. She was the cousin of Xie Zhen and Xie Bao. Gu had thick eyebrows and large eyes, along with a plump face and thick waist, and wore several decorative ornaments on her head and wrists. She was different from normal women of her time as she did not know how to handle common household affairs, and was only interested in martial arts. She was quite good in her skill with the cudgel and spear, and could take on twenty to thirty men at the same time. She was so fearsome (almost for comedic effect) that she often took great initiative in violent plannings and killings. Sometimes, she even beat up her husband when angered, thus earning her the nickname 'Female tiger'(母大虫).