User blog comment:IamJakuhoRaikoben/Chapter 447: Escape Battle, Review./@comment-5268982-20150803154702/@comment-25111584-20150804064317

GMG arc showed Ishgar that Dragon Slayers' are weak against transportation. It also showed that situations in which all Guilds need to unite can arise.

If ever a strike force has to be assembled in a Guild alliance, the Dragon Slayers would definitely be an important part. And, if transportation is ever needed, Blue Pegasus is the obvious choice.

Despite the shenanigans of its members, Blue Pegasus is quite possibly the smartest Guild in Fiore. They would definitely think about the above points, so it's not that unbelievable that they have a vessel customized to carry Dragon Slayers.

As for Laxus being in Blue Pegasus ... why do people find it plot-convenient? Laxus has not developed any sort of relations with members from other Guilds and being a Guild member is about the only job that would suit him. On the other hand, Blue Pegasus is run by a dear friend of his grandfather's. It is also the Guild which is on the friendliest terms with Fairy Tail. It seems like the obvious choice as all he really needs is a Request Board.

Plus, say he had joined some other Guild. Exactly how unbelievable is the fact that they borrowed the ship from Blue Pegasus? They need transportation to sneak into the Alvarez Empire and save Makarov. Blue Pegasus is the Guild to ask for help and they would definitely not refuse.

So ... don't really find Laxus being in Blue Pegasus or their ship being safe for Dragon Slayers to be plot-convenient. What I'd rather know is how they knew where Team A is. ._.