Marcus Waterbee

Constable Marcus Waterbee is Robert Ryunosuke's right hand.

Trivia

 * Despite being younger than Ryunosuke, he looks older.
 * It's stated that he has rejected multiple promotions because he liked assisting Ryunosuke too much.
 * In the Brickfilm version of The Duke of Etteren, he has a moustache instead of a full beard.