Differing from someone like Hassan-i-Sabbah who was a hero who actual existed, she is said to be one of legends born by the gathering of belief.
She was known as the 'woman who dominates,' an anti-hero who became as such due to the dark thoughts of humans. Rather than being a regular Heroic Spirit, she is an existence closer to a Divine Spirit, but her actions have made it better to categorize her as an 'anti-hero closer to a monster.' With her older sisters Stheno and Euryale, they made up the three Gorgon Sisters who inhabited the Shapeless Isle. Rider's identity is Medusa, the Gorgon from Greek mythology.
