I'm the first story in the first book of tales from the Pizza plex, we meet Jessica, who is really good looking. She also has a heart pendent she breaks to give life to others. Who else do we know with similar stuff? Shara, after making a deal with Eleanor. Jessica made a deal with Eleanor. At the end she scraped off the last of the heart and, like Shara, now Just breaks apart into scrap. So, most likely, Jessica made a deal with Eleanor and sold her life away. Especially when you look at the details of the story, it really all lines up.