Stheno in Wikipedia
Stheno (Greek: Σθεννώ, English translation: "forceful"), in
Greek mythology, was the eldest of the Gorgons, vicious female
monsters with brass hands, sharp fangs and "hair" made of
living venomous snakes. The daughter of Phorcys and Ceto, she
was born in the caverns beneath Mount Olympus. She and her
sister Euryale were immortal while the third sister, Medusa,
was mortal.
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 became this way by standing
with her sister, Medusa, when Medusa was cursed by Athena.
Medusa was cursed by Athena for meeting at Athena's temple
with the sea god, Poseidon, and was changed into a terrible
monster. - Wikipedia
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