Shungai Sou

Shungai Sou is one of the three Grand Officials of the Palace, holding the rank of Taifuu, and is known as a famous war hero. He is a peerless warrior and served the previous Emperor with great devotion. A great friend to Advisor Sho, Shungai has taught swordsmanship to both Ryuuki and Seien. He knows of the actual existence of the Eight Sages, and is often aware of Advisor Sho's plans.

(Source: Wikipedia)