Persephone

Persephone is the strongest of the three termini used by the Shades in The Name of the Star, and the one held by Rory during the defeat of Alexander Newman.
==Origins==
Persephone was given to Stephen when he was assigned to lead the Shades. Its whereabouts before then are unknown.
==Persephone in The Name of the Star==
In The Name of the Star Persephone was used by Boo to defeat ghosts. At the end of the novel, Alexander Newman tells Rory to hold the terminus while he kills her. It was his belief that if one were to hold a terminus whilst they died, they'd return as a rather powerful ghost. Newman had an obsession with this theory- he went as far as to kill himself and his fellow Shades twenty years earlier to test it. He also had an obsession with the Ripper persona he'd been building throughout the book. This obsession lead him to attempt to kill Rory (a slash to the abdomen), which would've been the final Ripper murder- and the perfect end to what he had started. Much to his disappointment, Boo's ghost friend Jo intervened. Jo seized Persephone from the bleeding Rory and terminated Newman. This blast destroys her and the terminus in the process. 
It is unknown to Rory at the time, but she had absorbed Persephone's power and was, essentially, a living terminus.
==Persephone in Rory==
If Rory touches a ghost they poof away, leaving behind only a faint flowery smell. In the beginning of The Madness Underneath, Rory could terminate a ghost without any physical reaction. That is no longer the case. By the end of The Shadow Cabinet, touching a ghost would cause her to get physically ill. She had wondered if being a living terminus was like having a terminal disease, or rather, made her immortal.