A few people have asked the question: How is Blitz coping with his separation from Raven?
Pretty well actually. It might not have gone so well had they been forcefully separated early on, at the beginning of the series. However, through the books both Raven and Blitz have been healing and developing their souls and minds. In book 6, Raven's sudden transformation allowed Raven's soul to have its own body for just a moment, which was enough to sever the connection between them. Luckily both their souls were complete enough to survive on their own without any damage. Raven's slowly getting used to having a body and moving around as his own person, and Blitz is fairly used to operating a body on his own most of the time anyway.