Cao Pi is one of the new characters from Dynasty Warriors 5 who returns in the following title. He has appeared as a generic in the games since Dynasty Warriors 2 and has an active role in his wife's Legend Mode in Dynasty Warriors 4: Xtreme Legends. He is Cao Cao's son and Zhen Ji's husband. He becomes the first emperor of Wei and is known for possibly forcing Emperor Xian to abdicate his throne.
Source from Wikipeida