User blog comment:IamJakuhoRaikoben/Chapter 398: The Final Duels, Review./@comment-4489126-20140902003802/@comment-25111584-20140903071310

Most of us complain about Erza's non-armour armour, but it basically comes down to the fact that some of her opponents have just too high a defence for her to surmount, so she is forced to use the weapon with the highest offensive power, which requires her to cast off all defence. Hence, the armour. ... Though she has sometimes been shown to use it needlessly in recent chapters. Well, I'm 200% sure that's gonna change with the grand (re)entrance of the Armadura Fairy. ... Not interested. >.>