Cassandra was born to a pair of wizards back in '99 and love was never something that the household was short on, especially since she had not only very loving parents but also a young aunt who doted on her dearly like nothing else.
Perhaps they'd thought she would end up with her father's family's psychic talents (which her aunt and father carried) rather than physical, but the name of the oracle was given to her nonetheless, and no one could imagine Cass with any other. She thrived in early childhood, making friends easily, always ready to leap at one of the others in the household for hugs, or even just to sit or lie on them.
Life was wonderful for the girl, she loved every part of it and couldn't imagine it not always being that way for as long as she lived.
At least until her parents were taken tragically from her, right before her eyes while she under their bed, bespelled by her mother so that the intruders wouldn't find the little girl.
It would have perhaps broken the girl completely if not for the aunt who took her in and provided her with all the love and care that she possibly could, in order to try and keep Cass afloat. She had lost two of her most beloved people in her life, but she still had one. And she would make sure that she never lost that remaining most special person.
Though she may have seemed too young to notice what Cate was doing, she was quite switched on and observant and the only thing that got her caught when she was snooping around was if her aunt managed to peek in on her thoughts.
Of course, things changed a little when Cassandra was accepted to Hogwarts and didn't get to spend as much time at home anymore, but she did enjoy the new school environment, making new friends, learning more about magic, which she decided would help her in being able to assist her aunt in years to come. She excelled in DADA, and when not in school, she substituted her 'smallness' with taking up Mixed Martial Arts, and excelling at it as well, very quickly.
Cass became intrigued with her aunt's work, even though the older woman tried to keep her niece from learning too much about what she did at such a young age. But Cassandra was growing up fast, and her teenage years brought rebellion and mischief as she started breaking into Cate's office to read through some of her work, not to mention when her aunt became a bestselling author, from solving the crime that had caused them both grief, it was impossible to keep Cass from reading it.
As far as she was concerned, the grisly details didn't matter. What mattered to Cass was that her aunt was doing good. She was solving crime and bringing bad guys to justice, and to her - the girl who now hero worshiped the older woman - it made her some kind of amazing role model to look up to and want to be like.
That was how Cassandra decided that she was going to fight crime, right wrongs, catch the bad guys and help the innocent. She wasn't stupid of course. She knew that she would have to study hard, and make sure that she did well in required subjects to become an Auror or investigator. The only thing that really got in her way was the fact that she tended to get a little hotheaded when it came to bullying or people doing something that would hurt others. She got herself into fights a few times.
And then in what was supposed to be her last year of school, she and Caitlin found themselves in danger while she was visiting home, and they were forced to go into hiding and on the run while those after them were being tracked down. This cost Cass a lot of her grades and meant that she was going to have to do an extra semester or so of study.
Apparently that study was going to be in a whole different country as well, as the women moved to Australia. And so Cass prepared to hopefully get through little more than the require semester so that she could focus on her future. Though, since moving she has become more confused about what it is she really wants. Does she just want to be an Auror because of her past? Is it still her calling, or is her love for performance too strong to ignore? It's a lot to think about for the young woman. Of course, that doesn't mean she can't have a little fun in the meantime.