User blog comment:IamJakuhoRaikoben/Chapter 477: Transport, Review./@comment-6401212-20160314174619/@comment-7418318-20160314175119

With her saying she's still loyal to Zeref, I doubt that Brandish would fight against another Spriggan... at least not so easily.

But speaking of her, I can't help but wonder whether or not Jacob is aware of Brandish's presence and whether or not she was affected.

If the magic sealing cuffs work make the wearer immune to magic, along with supressing theirs, she could have escaped the spell... but would still be stuck without magic behind iron bars and locks. If the cuffs don't work like that, she was affected, unless Jacob intentionally spared her, of which he gave no sign.