Jikokuten is a member of the Four Heavenly Kings, a group that serves Taishakuten as he protects the Buddhist world from all directions. Jikokuten himself protects the east. He is good at playing biwa, the deities find it quite entertaining. Because he was raised in a simple town, he is of a naïve and big-hearted nature. But with Zoujouten, he may also show some harshness since they are childhood friends. -- quote from Namu Amida Butsu! Wiki.