Maniae

In Ancient Greek mythology, the Maniae or Maniai (Ancient Greek: Μανίαι, romanized: Maniai; sg. Μανία) are the spirit or spirits of madness. Later poets also used the singular form (Mania), considering her as an independent personification of insanity, madness, and frenzied delusion, symbolizing various forms of mental disturbance such as hysteria, delirium, delusion, obsession, and possession. She or They operate closely with Lyssa, the spirit of rage and rabies, and, like Lyssa, are generally presumed to be daughters of Nyx. The Maniae are also associated with the Erinyes, the three fearsome goddesses of vengeance.

They are sometimes said—perhaps in jest, or as a metaphor for love’s often cruel and maddening nature—to have been the nurses of the god Eros.

Mania is mentioned in Iliad by Homer, as one of Ares' companions in war, alongside Lyssa (Rage) and Penthos (Grief).