Thrown into grief, Anna changed, resorting to drinking and gambling. It was during that time that she was charmed by the wizard who ended up getting her pregnant with Billie. Much of Billie's early years consisted of them moving from place to place while Anna struggled to hold down a job.

Around when Billie was 5, Anna finally landed a steady job as a house maid. It was then that the young girl started to show her first bouts of accidental magic. At first, her mother brushed it off as going batty, but soon it became apparent that her daughter was the root cause.

Anna thought perhaps she could beat it out of her child, but, when that didn't garner any results, she sought help from the church. However, after a certain, disastrous episode of accidental magic that ended with Anna getting into trouble with her employer, Billie was cast out.

Eight-years-old and alone, the girl cut off all her hair and acquired boys clothing so she could assume another life and find employment easier.

Although an honest sort of child, she constantly ended up with the wrong crowd of friends and became a rat catcher. She is quite good at her profession, but it pains her to have to kill the poor animals. Once, she made the rats in someone's kitchen just disappear. Unknown to her, they, later, were found in the house next door.

Not long ago, she wandered on foot from their village to Hogsmeade where she found herself among other individuals who were also different. Now, she scampers about town, making friends, clearing people's households of rats, and trying to start a new life for herself.