Setting: Medieval Fantasy
Branwen is an odd mixture of angel and demon, brought into existence by a court wizard who combined two summoning spells in an experiment. She was raised as a hidden being within the confines of the palace, taught her two heritages and shown the mixture of light and dark magic that she controls. When she came of age physically, she was introduced to the kingdom, and was accepted as a resident because of her gentle nature.
Time passed, and the kingdom was brought into a war, and despite protests for her to help, Branwen was not used as a weapon for the kingdom that had raised her. The war went on for many years, until a meeting was called to finally decide a truce. Many things were exchanged, including land and gold and resources, though the most surprising of offers that was accepted was that Branwen would be wed to the heir of the enemy kingdom when he came of age, as she was the closest thing to an heir that the kingdom she'd grown up in had.
Branwen has been dreading the years that have passed now, and the arranged wedding is quickly arriving, her first meeting with the soon-to-be king is even sooner...