Flame of the Huntress

18 year-old assassin, Vivian, is hired to kill the High Lord of the Night court. After being personally trained by Arobynn, the King of Assassins, she is hungry with bloodlust. Vivian has been hired to kill a plethora of courtesans and thief's. However, none has ignited her fiery passion more than her next mission: To bring a High Lord to his knees.
The High Lord of the Night court is expected to throw a ball in the evening. So, Vivian must disguise herself as a regular maiden, who cannot burn the whole kingdom down with a fiery cough, and do what she does best: Seduce, and when they least expect it, take the kill.

Disclaimer:
I do not claim to own any of the characters from A Court of Thrones and Roses or the Throne of glass series: all the credit is due to Sarah J. Maas.
The only character I take credit for is Vivian, as she is my OC.