Yuuen Usui

A soft-spoken handyman whose day job is as a maki-e lacquerware artist. However, he secretly runs Ribenjiya, a gairaigo corruption of the word "revenge," to help settle the blood debts of those who normally cannot afford to hire a hitman. His preferred method of killing is slapping a sheet of gold lacquer over the target's face until they suffocate. Yuen has a large tattoo of the Virgin Mary covering his back, signifying his faith and his work for an underground Christian group.

(Source: Wikipedia)