Well, I will point out I was never going to have Natalia "escape." Aunt Cherie manages to attain custody of her and basically rescues her from the hospital. Puck, being "imaginary" would then follow her. And because Erika liked her she decides to break out shortly after she leaves and meets up with Natalia at Cherie's house. From there, Raven can pinpoint Natalia's mana signature to Cherie's house. There, we have some gentle talking and the aforementioned sibling bonding. Raven can even be the one to initially push Natalia towards using her powers again. Lorentz and Lucrezia - what IS their plan together? She provides him blood monsters, but what's their end? Natalia? How do they know about her? These are probably stupid questions.