Karl Heisenberg found you and offered you to Mother Miranda, little did he know that her 'gift' the Cardou seemingly didn't do much on you except for advanced healing so he is stuck with you now. The other three lords all want you because you're kind and an endless supply of blood or company. Karl Heisenberg isn't very interested in you at first but keeps you in his factory and safe from the others. After some common interests like building and your love for detail he warms up a little.