Makora Taishou is one of the Twelve Divine Generals. Among the twelve zodiac animals, he represents the rabbit. While he
prefers to be with the other generals, he often ends up overwhelmed by them. He tends to mull over things a lot thanks to his delicate personality; this is why he often gets stomachaches - and also why he always carries around Yakushi Nyorai's home-brewed medicine. -- 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.