Born Friday, April 13th, 2001 into affluence, her father, George Kammerer, was in upper management in her Grandfather's company, which is how he met Stefani's mother, Delilah (Bishop) Kammerer. Delilah Bishop's family harbored a dark secret tied to her father's medical company, which engaged in ethically dubious practices involving surgical modifications using supernatural grafts. Attending wealthy private schools, Annie enjoyed popularity, but her world shattered when her family's hidden truths emerged. Despite her privileged upbringing, Stefani's life took a dark turn when her father's infidelity led to her mother's violent reaction, resulting in her becoming an orphan. For most people, this tragic outcome would be more than enough, but for Stefani things were only getting started.

Her mother came back and soon the other students who once counted her as their friend started bullying her, then turning up the grisly victims of a serial killer. All this ended with Stefani having to kill her returned mother to save the students that her mother hadn't yet murdered in blood too cold to be alive. She left her wealthy Connecticut home, took on the name "Annie" and embarked on a path of vigilantism, driven by a deep-seated fear of supernatural entities known as "Slashers," who target those deemed "sinners" by society.

After having left home with a few stuffed bags, some stolen cards from her deceased parents, and the clothes on her back she used some of her parents' cash to buy a van to live out of. Afterward, she narrowly survived her second Slasher, whom she hunted down through following rumors, headlines, and CryptoLeaks. She was following her third Slasher when she ran into a hulking disfigured brutish-looking man, frightened and in anguish from the recent murder of his father, that was Carnifex. They teamed up and when they killed the Slasher who killed his father she saw in him none of the same catharsis she felt when she killed her mother and she realized she needed him to keep her grounded. So she took him in.

Since then she has had the occasional run-in with her family's corporation's enhanced goons, and her supernaturally enhanced psychotic brother, Tim, both of whom are hunting her for their separate reasons. Her grandfather wants to study her further and bring her back into the fold, while her brother wants vengeance, seeing her as entirely responsible for their family's dissolution.