Sump is a Cyclops. He is the son of Ma Gasket and the brother of Torque.
The Heroes of Olympus
The Lost Hero
Sump was with his mother and his brother Torque in Detroit, when Jason, Piper, and Leo crashed Festus there, Sump helped catch them. He wears a fiber glass toga. He also fell in love with Piper, thanks to her charmspeak. He also demonstrates the "squeaky war hammer" to Piper. Afterwards he was killed by Leo but reformed almost as fast due to Gaea controlling the Doors of Death.