Yu Jin

Yu Jin (于禁, Yú Jìn) was the Guardian Spirit of Cao Xuan Liang.

Personality
He's a guardian spirit of Cao family and he vowed to protect the Cao siblings: Cao Xuan Liang and Cao Yan Bing even though it means his life. He died because of his will to protect the little lord: Cao Yan Bing by opening the seal of the Yamas of Ten Hells to release the multiple gurdian spirits inside of it and wished to pass down to them his duty to serve the Cao family.

Trivia

 * Yu Jin is based upon the historical figure of the same name.