Hayden's parents, her biological ones, are ghosts. Not literally, but they might as well be, seeing as they aren't anywhere and Hayden isn't sure whether they're even still alive. Basically, two young teenagers met and after a quick fumble in the dark, a seventeen-year-old girl found herself lumbered with a child she didn't want. So, Hayden found herself put up for adoption straight after birth - and that's the end of that.
Her adoptive parents stepped in pretty soon after. Married couple Fiona and Johnathan Browne, unable to conceive on their own so they wanted to give another child a chance in life; they chose Hayden, moved to America and started their own life.
It was a nice life, too. She grew up in a suburb, in a white house with a picket fence and a rose garden and had everything she could ever want in life. They even had a dog. Blessed with their own child, Hayden's parents poured everything into educating Hayden, determined to give her the best upbringing possible, and they really did. There was just one problem: they taught her everything Muggle. Of course they did, what were they to expect? Certainly not that Hayden's biological father was a wizard. Or that he'd passed his magical blood onto his illegitimate daughter.
So, Hayden grew up ignorant to her heritage or her powers, and didn't figure out anything was wrong until she started managing to change the colours of things just by touching them. Then her eleventh birthday arrived, as did the Salem letter, and things began to click into place.
The first three years were smooth-sailing, kind of, as although she was insanely untalented with a wand, she settled into Salem like she'd been there all her life. Friends were made, experiences were had and Hayden even managed to learn to colour-charm her hair when everything went wrong.
Long story short, her parents went bankrupt. Something dodgy happened with her father's business, some sort of market crashed and before she could blink, they were on a plane to England and living in the crappiest little flat in an equally crappy town. Hayden isn't one to complain, not when she knows how lucky she is to have such an amazing family, but god, she hated it, still does. It's damp and it stinks and she's pretty sure it's why she gets coughs all the time. However, now she attends Hogwarts, and she sticks out like a sore thumb. Bless her.