How the hell did Tusk live through that bombing in episode 21? He is the person that the bomb was closet to since it was on his person, so how is it possible that he lived?
This is just a guess, but I would say he actually died. However, because Ange wanted him to live so much, her ragna-mail brought him back to life.
(After all, it could merge worlds and travel between them, who's to say it couldn't bring Tusk back.)