Duke is a character appearing in Professor Layton and the Diabolical Box. Duke looks and kind of is stuck up. He is one of the people to whom Layton and Luke must talk in order to gather all of the pieces of the missing photo scraps. Duke is seen, throughout Layton and Luke's time in Folsense, around the Museum's single entrance.
Duke wears an outfit similar to Luke Triton's. He wears a blue cap, blue jumper, white shirt, red tie and red shorts. He has brown hair and black eyes.
Though it can seem Duke talks down to people, it's actually just the unfortunate way he holds his face that makes him seem that way. His softer side comes out when he's with his little brother, Niles.