Skull Eater

Skull Eater was a Laistrygonian giant who in The Lightning Thief (along with Marrow Sucker and Joe Bob) infiltrated Percy Jackson's school posing as visitors from Detroit. While undercover, they joined a dodgeball game after being recruited by Percy's bully Matt Sloan. During the game they transformed and attempted to kill Percy with flaming dodgeballs. Skull Eater participated in the fight and was one of the more lethal giants. He would have succeeded in killing Percy had his Cyclops brother not been around to start redirecting their blasts. This resulted in Marrow Sucker's demise. Skull Eater was able to continue fighting until the unexpected threat punched him in the face which presumably is what caused him to disintegrate and travel to Tartarus. This makes Skull Eater the second of the three named giants to die in the battle.