Kai Oku
About
Kai Oku is Shou Hei Kun's right hand and a commander in his lord's army. He also a lecturer at Qin's Strategist Academy and the former teacher of Ka Ryo Ten and Mou Ki. In addition to teaching as a lecturer, he is also a capable tactician, capable of personally participating in battle and fighting. He is also a skilled diplomat, having been sent to the Han Kingdom as the head of a delegation. Kai Oku personally took part in the battle for the city of Sai and the Qin campaign to capture the city of Gyou. (Source: Kingdom Wiki)