|Japanese name:||南光坊天海, Nankōbō Tenkai|
|Occupation:||Monk and Political Advisor|
|Family:||Douhaku Ashina (twin brother)|
|Manga Debut:||Chapter 1|
|Anime Debut:||Episode 1|
Tenkai Nankoubou (南光坊 天海, Nankōbō Tenkai) is a High Priest of the Tendai Buddhist Temple and Political Adviser to the Tokugawa Shogunate.
Tenkai has the appearance of a short bald old man being almost 107 years old with large burrowed white eyebrows that cover his eyes usually and matching white goatee. A large beak like nose and wears typical monk garbs consisting of a dark robe and darker obi wrapped around his waist and gold and yellow shawl stringed shawl around his neck.