Yami Sukehiro (ヤミ・スケヒロ)

Yami is a large man with a muscular build, wild brown hair with the front brushed back, small eyes, a mustache, stubs on his chin, and a thick neck. He is also mostly seen smoking.

Yami also wears a black tattered cape with the black bull emblem on it and a strap around his neck, over a white tanktop, along with a book belt around his waist, black pants under light colored chaps, and black boot.

(Source: Black Clover Wikia)