Cao Anmin (onyomi: Sō Anmin) is a nephew of Cao Cao. During Cao Cao's brief stay at Wan Castle, he introduces him to the wife of the castle's former lord. This leads to Zhang Xiu's surprise attack, in which he fails to escape and is killed.
In the Dynasty Warriors series, Cao Anmin has made his only appearance in combat at Wan Castle. Even if the player clears the stage with him alive, there is usually no way to save Cao Anmin.
He accompanies Cao Cao in Dynasty Warriors 7 throughout the whole battle with Dian Wei and can be spoken to at the small party before the battle. He can be killed during the battle, but even if he is saved, he won't appear in future battles.
In Dynasty Warriors 8, saving his life is a requirement in preventing the death of Dian Wei. After some time at Wan Castle, Cao Cao will remark that his son and Cao Anmin are also in the castle and should be rescued as well. If the player gets to both of them soon enough and rescues them, Dian Wei will survive the battle if he is not defeated later.