* Stheno: The eldest and most level-headed of the three Gorgon sisters.
* Euryale: The middle sister, known for her fierce nature and venomous stare.
* Medusa: The youngest and most famous of the sisters, originally a beautiful woman cursed by Athena to have snakes for hair and the ability to turn anyone who looked at her into stone.
Important Note: While the 2010 film depicts all three Gorgon sisters, in Greek mythology, Medusa is the only one who can turn people to stone. This is a significant change made for the film.