User blog comment:IamJakuhoRaikoben/Chapter 403: Erza vs. Kyouka, Review./@comment-24784846-20141006235814/@comment-7418318-20141007081104

"It's been proven that what works on magic does not work on curses"

Sorry, but for me a single line out of some old book that Levy conveniently pulled out of nowhere (Why did she have it along with her again, if she didn't know about the armour beforehand? Why does she even posses it in the first place?) just for plot-conveniencing the audience is not something I consider solid proof. Especially when there are two different interpretations of the translations and both are vague to begin with.

Also: Fire Dragon Slayer Magic can absorb Explosion Curse. Take-Over Magic can manipulate (to some degree anyway) Macro Curse. Galaxia Blade Celestial Spirit Magic could undo the Alegria Curse.

For me at least those are enough reasons to consider the matter uncertain and possible to go either way. Having the Nakagami Armour negate Kyouka's curse-effects on Erza's body would certainly have been a lot better, more logial and more enjoyable than what really happened in the chapter.