Jake Mason

Jake Mason is a demigod son of Hephaestus, and the replacement counselor of Charles Beckendorf for Hephaestus' cabin.

The Last Olympian
Jake first appears in The Last Olympian and helps brainstorm with Percy, Annabeth and the other campers. He fights with his cabin, and when the battle is won, he is among the campers that goes up to Mount Olympus and was thanked by the gods. He becomes the counselor for his cabin when Charles Beckendorf dies.