User blog comment:IamJakuhoRaikoben/Chapter 371: Tartarus Arc: Part 2 - Song of the Heavenly Dragon, Review./@comment-5598380-20140214234919/@comment-7418318-20140215000437

With her going to Igneel with her comments about Natsu maybe dying, it'd make sense for Grandeeney to be the first to no longer be able to keep out and intervene and the other two Dragons only coming in a bit later.