Raphael and Andrea: I didn't like Andrea that much in the series: she doesn't accept herself, is prejudiced, lives too much by the book to my tastes and tortured Raphael quite a bit by playing hot and cold. In this novella we learn more about her past and it explains a lot. 
 Raphael is true to himself, just what the girl needs. 
 Nice story, packed with action, emotions and revelations, during which their relationship develops further. Just one thing: having to (view spoiler)[do research to recognize Cerberus... (hide spoiler)] whaaat ?