Ma Gasket

Ma Gasket is a female Hyperborean (or Northern) Cyclops and the mother of two other Cyclopes, Sump and Torque. Unlike the better known Elder Cyclopes, Hyperborean Cyclopes don't make weapons for the gods; instead they eat demigods, much like the Southern Cyclopes.

The Lost Hero
She meets Jason Grace, Leo Valdez, and Piper McLean when they crash in their car factory in Detroit (Monocle Motors). Leo is able to kill her with an engine block. But instead of staying in Tartarus, she tries to reform, but by the time she does, Leo, Jason and Piper were already half way to their destinations. She is said to be 12 feet tall. She is also quite boastful of being a Northern Cyclops, for they are much fiercer than the Southern ones.

The Son of Neptune
Some time after reforming from Leo's attack, Ma Gasket joined up with Polybotes' army. She lead a group of Cyclopes south to Camp Jupiter, but Polybotes complained her troops were slowing them down. She's eager to get revenge against Leo, Piper, and Jason. When Polybotes arrives at Camp Jupiter the day before the Feast of Fortuna, Ma Gasket had taken the other Cyclopes to a wine tasting and prevented Polybotes from attacking that day. She was killed by Tyson during the battle on the Field of Mars. Tyson kills her saying "Bad Cyclops lady! General Tyson says GO AWAY!"

Trivia

 * She is the only female Cyclops ever mentioned.
 * She wears a chainmail 'muumuu', as Leo put it.
 * She likes eating demigods with salsa.
 * She is most likely a Roman Cyclops, since she calls Piper "Venus spawn", when Piper is really Aphrodite's child, and because was seen in the battle in Camp Jupiter.
 * She also tells Piper that she once ate a son of Mercury, who is Hermes in Roman form, the boy wore a purple t-shirt, like Jason had when he first showed up at the Grand Canyon, the boy also spoke Latin, like Jason. When Piper told Jason about it, he felt like he should know that boy.
 * She also says that most Cyclopes grow up on the streets, and that she should have abandoned her kids too, as growing up on the streets makes a Cyclops grow up stronger.
 * Piper's Charmspeak doesn't work on her, but does on her sons.