Looking to play a fantasy setting where your character is a great warrior. Mine is a young apprentice/squire that has always admired her, or perhaps more than just admire.  
She would eventually embark by herself to confront a vampire, a very simple battle for her, but she'd let the creature turn her, either under threat, or by pretending to be defeated. The result would be the same: she would start turning and kill her sire to be completely free from the moment her new life began.

Soon enough her apprentice would arrive, and realizing what happened would try to fight her. Naturally he wouldn't stand a chance.

From that moment we can wing it, but I have a few ideas about how she would behave. Maybe her mind has been twisted by the transformation, seeing him as little more than an obstacle, or someone who knows her secret, making her goal to enthrall him. Perhaps she finds it adorable that he'd try to be so heroic and plays with him. Or she may take a more chivalrous yet twisted approach: He helped her get this far even knowing she's never return his "secret" feelings, so maybe she would reward him. (Or any other logic to lead us to the expected ERP dynamic. In any case my character would not be turning unless that's the open end of the play)

Kinks and limits to be discussed.

[M4F] I prided myself in being the squire of the most powerful warrior, until you went missing, and I took it upon myself to rescue you. Truth is, fear of aging and losing your strength made you make a terrible choice: turning to a vampire. And who better to try your new body on than your loyal help