Xiahou Yuan

Xiahou Yuan (夏侯渊) is the Guardian Spirit of Cao Yan Bing.

Spirit Army Arc
Xiahou Yuan is introduced along side Jaap Xu Huang, when Cao Yan Bing asks them to comply with him, to aide him in his battle.

Trivia

 * Xiahou Yuan appears to be based upon historical figures Xiahou Dun and Xiahou Yuan.