Darker Than Black: Hei

Hei is a young man, with black hair and dark blue eyes. When off duty, Hei can be seen in the casual attire of a Chinese transfer student. When operating as a Contractor, however, Hei dons a black, bullet-proof trench coat and a white mask.

Later, after the events that transpire at Hell's Gate, Hei allows his hair to grow out to shoulder length; though he often keeps it tied in a ponytail. He also now wears a purple and black jacket and a snow cap on his head. Hei also appears to have neglected shaving.

Shortly after this, however, Hei cuts his hair back to normal length, shaves, and returns to his "Black Reaper" attire.