Antera Taishou is one of the Twelve Divine Generals. Among the twelve zodiac animals, he represents the monkey. Among the Twelve Divine Generals, he's something like a mood-maker and jester combined. He tries his hardest to be useful to hissuperiors, and volunteers for a lot of work in the process. He's relied on by his superiors in turn, namely Yakushi Nyorai, Nikkou Bosatsu, and Gakkou Bosatsu. -- quote from Namu Amida Butsu! Wiki.

Since the original design used some animal characteristics, it is advisable to add an animal head to the character. There is also some inspiration from this artist's model.