Jia Xu (onyomi: Ka Ku) is a strategist who has been highly praised for his sly wit. He has been described as a person who "shares the same intellect as Chen Ping and Zhang Liang". He first served Dong Zhuo, followed by Li Jue and Zhang Xiu before surrendering to Cao Cao, and becoming Cao Pi's Grand Commandant. Though he was valued by the Cao family, it was said that Jia Xu was a suspicious individual who was never fully trusted by his masters.