In Greek mythology, Lyssa (Greek: Λύσσα; called Lytta (Λύττα) by the Athenians) was the spirit of mad rage,

frenzy and rabies in animals. She was closely related to the Maniae (possible twin), the goddesses of madness and insanity. Her Roman equivalent was variously named Ira, Furor, or Rabies. Sometimes she was multiplied into a host of Irae and Furores.
Appearance[]
Lytta is usually portrayed as a young woman with wild eyes and flowing hair, symbolizing uncontrollable energy.
In art, she may wear a short tunic for movement and sometimes a headpiece shaped like a dog’s head, connecting her to rabid madness and animal fury.
Personality[]
Lyssa is intense yet conflicted she brings madness but doesn’t enjoy causing suffering.
Unlike purely evil spirits, she often acts under divine orders, especially from Hera or Dionysus.
Her nature reflects the fine line between divine inspiration and destructive insanity.
Myth and Role[]
Lyssa appears in Euripides’ play “Herakles”, where Hera sends her to drive Heracles insane, making him kill his wife and children. In the story, Lyssa hesitates and feels pity, showing she’s not cruel by choice.
She’s also connected to the myth of the Minyades, women driven mad by Dionysus for refusing to worship him.