Steropes the Lightning Bringer was one of the Cyclopes, hybrid-beasts created by the Isu as part of the Olympos Project. During the 5th century BCE, the beast was held in a cave within the Bay of Nobody on the Greek island of Andros.
- In Greek mythology, Steropes was the name of one of the sons of Uranus and Gaia, and his name, "Στερόπης", meant 'lightning'. Steropes and his brothers Brontes, Arges, and the Hekatonchires were cast into the pits of Tartaros by their father, who was repulsed by their appearance and fearful that they would usurp him. Kronos, who deposed Uranus shortly thereafter, freed them briefly before imprisoning them again. They were later freed by Zeus during the Titanomachy and forged his famed thunderbolts, along with Poseidon's trident and Hades' helm of darkness.
- Even though Steropes' eye looks similar to Brontes', Kassandra does not retrieve an artifact after defeating him.