The Mistress (Ghostbusters)

The Mistress is a villain from the Extreme Ghostbusters series.

The Mistress sets out to conquer various worlds and parallel dimensions by broadcasting a controlling frequency that remotely possesses certain corporeal beings. Demi-Dog then crosses over first and commands the legion of possessed corporeal beings. This is a steady signal with constantly shifting frequencies, making it nearly impossible to disrupt. In New York City, the possessed beings were thousands of dogs. Soon after the Extreme Ghostbusters trapped Demi-Dog, the Mistress caused a full inter-dimensional breach and crossed over through a portal. Enraged by the prospect that her pet was defeated, the Mistress transmogrified and attacked the Ghostbusters. She proved to be very agile and dodged the Proton Streams. Roland taunted the Mistress and trapped her. With the signal broadcast severed, all dogs returned to normal.