Fan Rui is a fearsome-looking man with untidy black hair, who wears armour over a silk robe, and wields a sword and spiked chain mace in battle. Apart from being a powerful warrior, he is also a master of Taoist sorcery and can control the weather and subdue various evil supernatural beings. He is thus nicknamed "Demon King of Chaos". Fan Rui is one of the leaders of the Liangshan infantry. After the victory over Fang La, he accompanies Gongsun Sheng and Zhu Wu to study Taoism for the rest of his life.