Li Yun is a man with a broad face, thick eyebrows, a red beard and green eyes. He excels in martial arts, wields a saber in battle, and can fight dozens of enemies at the same time. He is nicknamed "Green Eyed Tiger" because of his appearance and combat skills. Li Yun is in charge of overseeing the construction of buildings and living quarters for the Liangshan heroes. Finally, he is trampled to death by Wang Yin's horse during the campaign against the rebel leader Fang La.