...I am a 'bloodfiend'. I know not the term other worlders use, but it is a disease passed on from one to another, where we become enthralled by a desire to feed, lest we perish away from a blood-starved madness. [a pause, and then she elaborates]

Ah, fear not. I hath not needed to feed in over two centuries. I hath always found sustenance in blood substitutions most satisfactory. But 'tis not always the case for my kind.