The Vanguard

When Kalyna King is found in a burning car after her parents were assassinated, she is taken in by Mathias, the boss of the same organization her parents were a part of. She trains to become a hitwoman with the goal to avenge her parents' deaths and find their killers. When she fulfills her goal, she is found by a mysterious hooded man who vows to take her back to where she can learn more about herself, somewhere that isn't Earth. Kalyna finds herself in an entirely different world called Valoria. She is given a choice to stay in Valoria to become something more or return to Earth and go back to her old ways. In the new world, she will be given the opportunity to discover who she is and what she can become, a warrior.