1) Alexandra was the most powerful princess of her time. Smart, calculating, poised, and a warrior, she would have made for an excellent ruler with or without a husband. There was only problem, her kingdom of Akeilia, a monarchy, has been in a hundred year war with Luxor, a constitutional monarchy, and her kingdom is on the losing side. Her parents died during her infancy and she had been their first child. Raised by the military, she is quick to fight and does not exhibit at all the manners expected of her station. Now, she stands ready for her final battle on the edge of what will become her grave with the few loyal hundreds of men prepared to stand against the thousands that her enemy commands. She will lose, but not die. Rather than kill the entire kingdom that will raise their arms in violent protest at their princess's death, the prince and courts (or just the courts against the prince's desires, which I think could be more interesting) have another idea in mind. They will force her (or them) into marriage. But what happens when Alexandra no longer has to fight? Can she adjust to life as a real princess or will the change be too much? Can she ever grow to love her new husband or will he always be her enemy?
2) Another idea that I have is of a young woman who throws herself into the world of the occult at a high price. Selling her soul to the demon, she gains the money, status, and a power to exact a revenge that had previously been out of her reach. It will be complex and deal with many people dying working from the outer to the inner circle. However, after two people have died at her hands, God sends grants her guardian angel human form in the hopes that his voice and reasoning will stop her. If he can't stop her, he could face serious consequences, but doesn't necessarily want to divulge this motive to her too soon. There may even be a chance to regain rights to her soul if she doesn't continue exacting her revenge and finds a way to repent. This could lead to many things much later, including helping those with demonic problems. However, will she want to hear the truth from an angel? Is she possessed and past salvation?