A general under Wu and sworn brother to Sun Ce.
Zhou Yu joined Sun Ce in his conquest of Jiangdong. After the death of Sun Ce, Zhou Yu swore loyalty to Sun Ce's brother Sun Quan.
When Cao Cao attacked Wu, Zhou Yu led a successful defense at the Battle of Chibi. He later helped Sun Quan conquer the Nan Commandery.
Zhou Yu died of illness at the age of 35.