Her name is Mary Sebastian Grayson and she is an evil variant of main Lady Invincible from another universe, where she rose to power through sheer brutality. She was assembled by Angstrom Levy to help start the Invincible War in the mainstream dimension. She has a violently unhinged, cruel, aggressive, confident, theatrical and sadistically gleeful personality embodying pure chaos and destruction. She relishes carnage for its own sake, showing no higher goal beyond domination and devastation.