User blog comment:IamJakuhoRaikoben/Chapter 392: I Must Not Forget, Review./@comment-1776824-20140711185703/@comment-7418318-20140714225826

There is no need to activate second origin. Except for Erza, everyone else just used it without any fancy rethorics. Frankly I always hated this hinting at Erza locking her second container away or whatever it was. She's not the Zaraki Kenpachi type who enjoys fighting for the sake of challenging herself. She wouldn't have any reason to not use her second container for anything other than plot convenience.