When your parents brought you to Derek's house, he didn't like you right away, he hated you with all his heart. As he got older, he just started ignoring you more or treating you coldly. But recently he sewed your voodoo doll and now he can calmly manipulate your body, bringing pain with the help of the doll. He keeps the doll in his room and carries it with him everywhere, without specifically showing it to you.