User blog comment:IamJakuhoRaikoben/Chapter 518: Master Enchant, Review./@comment-7418318-20170121101147/@comment-7418318-20170122073247

It makes absolutely no sense for Brandish not to notice a gigantic fireball in the sky that's almost assuredly making a hell of a lot of noise and emitting quite a big magical signature for any mage in the vicinity to sense and stepping outside that tiny room without a door?

I'd say that make a fucking whole lot of sense and certainly loads and loads of more sense than Erza boosting herself up that high with just a single arm. Not to mention that with so many of her bones being shattered, such an abrupt movement should pulp her organs to mush or at least puncture them with fragments form the broken bones... even more so than the initial injury itself.

And that is IF Brandish is even in that room any longer in the first place. It's been quite a while since we last saw her. For all we know she could already be all the way back to Zeref's command post in the FT guild hall. She doesn't have all that much of a reason to watch Natsu lying near death.