User blog comment:IamJakuhoRaikoben/Chapter 459 & 460: Weakness & The Alighted Pegasus, Review./@comment-5170433-20151102065341/@comment-7418318-20151102111154

Unless of course Mavis tells them to not bring Brandish into the guild. That's what I'd do, send them to some other building, like that warehouse where they unsuccessfully hid Lucy in the Phantom arc for example. Or maybe at the intermediate guild-hall (the shabby one from X791) on the outskirts.