|Parents||Phorcys and Ceto or Typhon and Echidna|
|Siblings||The Hesperides, Euryale, Medusa, Graeae, Thoosa, Scylla, and Ladon or Cerberus, Hydra, Chimera, and many more monsters|
Of the three Gorgons, she was known to be the most independent and ferocious, having killed more men than both of her sisters combined. In Roman mythology, she was transformed into a Gorgon for her relationship to her sister Medusa, a priestess of Minerva, who had a sexual encounter with the sea god Neptune (mythology) in her goddess's temple. Furious with Medusa for this act of desecration, Minerva changed her into a terrible monster, along with her sisters Stheno and Euryale. Stheno tends to be depicted as a thin gorgon monster with red snakes curling around her head instead of hair. Earlier accounts, however, describe her as having a scaly head, a boar's tusks, bronzed hands, a protruding tongue, glaring eyes and a snake around the waist as a belt.