Part of the duo of profession thieves call "Phantom Thief Troupe, Matsuri" who are in the business of stealing rare artifacts belonging to the so called "Nanana's Collection." He is called "Hundred Faces" because he is a master of disguise. He uses his skills to either deceive someone or to infiltrated any establishment that he and his partner, Yukihime, plan to target. However, he isn't very smart and most of the time, bungles up which often earns Yukihime's ire.

(Source: Anilinkz)