Koumokuten is a member of the Four Heavenly Kings. He serves Taishakuten, who is responsible for protecting the Buddhist world from all directions. Koumokuten himself protects the west. He possess a clairvoyance that can perceive all phenomenon within a given range. It caused him great trauma in the past and since then, he has hidden it from all other than those very close to him. It seems difficult to get close to him at the first glance, but when you try, you'll find him unexpectedly kind and considerate. -- quote from Namu Amida Butsu! Wiki.