Christina was born on a Halloween night in Dublin, Ireland in the Earth Dimension to an Irish mother, who had British ancestry and a dual citizenship (British and Irish), and an American father, who had German, French and Swedish ancestry. He held both American and Irish citizenship. She was an only child.
Christina's parents were both Lunar Elementals and in the Elemental Dimension, they were subjects of the Lunar Kingdom.
And not only were they Lunar Elementals and subjects of the Lunar Kingdom, they were assassins too. They were members of a group of assassins, operating in both dimensions, working towards fighting for the oppressed and eliminating the corrupt. Their enemies were normally members or associates of a secret society, called The Unity Order, that worked towards "maintaining" elitism.
Shortly after her birth, like most Elementals who weren't born with the power of Earth, Christina was taken to the Elemental Dimension. She was taken to the Lunar Kingdom, becoming a subject.
Christina's mother went on hiatus in order to look after Christina. Her father, on the other hand, continued being an assassin.
There was an incident in which Christina's father saved a lot of the members of the Lunar Kingdom royalty's lives, including the Dange siblings, from being assassinated.
Although he wished that he could have been rewarded for this, he knew that his occupation stopped him. And so he left them clueless as to who saved their lives that day.
Christina grew up from being a playful little girl to a strong young woman. Her parents, when she was around 15, told her all about their lives as assassins. Christina didn't believe them at first, but as they continued to inform her and tell her, she eventually realised that what they were saying was true.
She also wanted to become an assassin herself, not to kill people but to carry on the assassin bloodline that ran through her veins. Although her parents were initially hesitant, as they didn't want their daughter to turn into a murderer, despite the fact that the assassins murdered those who contributed to the oppression of innocent people, they complied with Christina’s wishes. After all, this was what Christina truly wanted and they had always aimed to give Christina whatever she wanted.
After a year of initiation and training in weaponry and hand to hand combat, Christina became a fully-fledged member of the assassins.
And so she began her spree of assassinating the corrupt, having a tendency of using her chain whip and her kukri in order to achieve this. Outside of her life as an assassin, she continued to pretend to be normal. She entered into a relationship with an American Earth Elemental, Ambrose Derringer. However, this relationship didn’t last because he cheated on her.
Instead of getting distraught and angry, Christina simply left him and carried on with her life.
The circumstances were about to get complicated. She had assassinated a crime ring and had murdered her way right up to the ringleader of that crime ring. Most of those she had assassinated called Christina "The Brain-Washed Girl", mocking her for "choosing" to be an assassin. But this ringleader was much more powerful than Christina, who had just turned 17 by this point.
She knew that before she could face this ringleader again and defeat him, she had to build up power. After all, this ringleader had influence everywhere.
So she thought of a solution. She could gain more power at the Elemental Academy. She wanted to do this by learning. She also didn’t want to assassinate anyone else, not until she had killed this ringleader.
And so she put her assassin’s clothing in a safe place and headed to the Academy to enroll.