Squigly is the last "surviving" member of the Contiellos, a famous line of opera singers and long-time clients of the Medici family. Fourteen years ago, tragedy befell Squigly’s family when the Medici Mafia came close to obtaining the Skull Heart. Lorenzo's top assassin, Black Dahlia, was ordered to murder Squigly and her parents by the Mafia - the very people who seemed to be some of their family's closest allies. It was during this incident that she became one of the Skullgirl's undead minions. Once the threat had been defeated, only Squigly’s body was recovered, and she was buried in a service provided by himself. Squigly was not resurrected during Queen Renoir's transformation into a Skullgirl, as the Queen was currently in another land at the time and her powers did not extend back to the Canopy Kingdom's dead-and-buried. Fast forward to the present: Bloody Marie's emergence has awoken Squigly from her long sleep. As part of the Skullgirl’s undead legion, Squigly should have become nothing more than a mindless servant of the pale maiden. However, thanks to the powers of her Parasite, Leviathan, she is spared this fate. Having been passed through the Contiello family for generations, Leviathan is refined and dotes on Squigly like her father and previous host did. This long familial history has made Squigly's bond with Leviathan deeper and more fundamental than that of most Parasites, and allows them to work harmoniously both in and out of battle like synchronized dance partners. Their unique circumstance also seems to have given them abilities beyond this world, as well.