The idea that she turns into a corpse is something I ' ve been thinking about since the beginning . My original idea was that she slowly decays when she ' s out of fresh blood , when she ' s hungry . Blood rejuvenates her . Without it , she looks like what she really is a three hundred years old dead body . But the idea that she degrades into a corpse in her sleep is very good , too . The idea that she feeds him blood and he starts to turn , very slowly , week after week , drinking only a drop of blood she discreetly puts in his drinks , and he starts to see the other side ghosts , demons , human thoughts , starts hearing the dead whispering to him , I mean it gives me the creeps . It ' s great . I can almost see how the director uses this idea on screen shows it with lightning and color grading etc . Great idea . Why is she targeting him ? Well , the idea is he ' s got a very very rare blood type . Only about 50 people on the whole planet have this type of blood and it ' s like the best thing you can get if you ' re a vampire . It ' s called ' the golden blood ' and it gives you incredible powers and longevity and you just orgasm all the time you have it in your mouth . That ' s why she wants to turn him make him her host ghoul , just keep him alive half dead so that she can feed on him forever .