Duke is a veteran miner, and an excellent driller. He has mined for diamonds, gold and even survived a cave-in, but his never seen Rockmonsters before and is not sure if he wants to believe in them.

He is one of the main Miners.

His minifigure has a two-sided face (one frightened, one grinning) and he comes in both the original blue Power Miners torso/pants and the newer silver one.