Kadokura Yuudai is the #16 Referee of Kakerou.

Spoiler

At some point after the events of the Labyrinth Arcs and the Tower of Karma Arc, he became the #2 Referee.

Kadokura is a tall man with a distinguishing appearance with the most noticeable thing being his black hair set in a large pompadour (a style he has had since his delinquent days). As with all Referees, Kadokura dresses in a formal black suit with a noticeably long blazer jacket; he also wears a pair of unique white gloves which have a multitude of bumps on the backhand.

Spoiler

After his battle with Minowa Seiichi, in which his left eye was badly damaged, he wears an eyepatch for the remainder of the series and he now lets his hair down, wearing it in a relaxed style.

Spoiler

Near the end of the Collecting the Handkerchiefs game, he redoes his pompadour.