Aello was one of Hippolyte's Amazons. She was the first to attack Herakles when he came for Hippolyte's girdle. Unfortunately, Herakles now wore the lion skin from his first labor, making him invulnerable. Aello could not kill Herakles and was killed herself. Her name means, "Whirlwind."
Bravest of Amazons who
Bloody fight ensued,
Broken, bleeding on the ground,
Killed by Heracles.