User blog comment:GK2151/My beef with Elfman/@comment-7418318-20150422210942/@comment-5894890-20150423005015

Unless Lisanna was held hostage or something I don't see any other reason. Even so, I'm guessing Mashima would have written it differently. Maybe something like him having an internal battle within himself; whether or not to do it, but then maybe someone like Cana would persuade him of his family and their ideals or something? "Would Lisanna have wanted this? We can save her together" that kind of speech :P.