Thirteen-year-old younger brother of Empress Cao, raised by his uncle Cao Cong after his parents died. He is fourteen by the journey's end. He has lived two lives (transmigrator) and died from loyalty in his previous life. He admires men of loyalty and noble character. His literary talent is average, but his policy essays on military strategy impress Teacher Zhu. He cares deeply for his nephew Cao Tun.
