Genpachi Inugai

Bears the shin bead of faith his birthmark is on his left cheek underneath his left eye. The stereotypical crazed enforcer of the group he is introduced as an inmate in the Shoguns prison most likely jailed for his uncontrollable behavior or perhaps just his sharp tongue. He is allowed a chance to win back his original post if he is successful in killing Shino. Compared to the plot exposition of most of the other major characters not much of his origin is revealed or even implied during the series.