Invadiah was the most powerful erinyes in the Nine Hells and was the leader of Glasya's elite Erinyes guard, the Pradixikai. She had fifty-eight erinyes daughters, one cambion daughter and a cambion son named Lorcan whom she regarded as worthless.
In 1478 DR, Invadiah sought to carry out Glasya's plot to trick Asmodeus into fighting the Abolethic Sovereignty. Unfortunately for her, the plot unraveled, primarily due to betrayal by the succubus Rohini. As punishment for her failure, Invadiah was "demoted" to succubus and her holdings given to her daughter Sairche.