User blog comment:IamJakuhoRaikoben/Chapter 518: Master Enchant, Review./@comment-125.212.122.49-20170121132827/@comment-7418318-20170121192729

I wonder if at this point August even is any stronger than Irene.

If Irene never used her Dragon and Dragon Slayer magics due to hating them, it could be that nobody ever learned of her true power, except for Zeref how knew her background.