Portia was with her four accomplices in the Sanctuary at the time when Tesseract invaded and murdered Ceryen. Portia turned into her spider form, but as she was an apprentice, she became a mutated human-like spider. She attacked Tesseract, who responded by jabbing Syc's daggers into her armour. Shortly afterwards, Portia became possessed by a Remnant. Her fate remains unknown.
She and Syc murder Bernard Sult in front of every Sanctuary in the world as a reprisal for the death of an Irish mage in America. She also fights Skulduggery and China alongside Syc, but is defeated. It's not sure if she survived.