User blog comment:IamJakuhoRaikoben/Chapter 350: Gray vs. Doriate, Review./@comment-4489126-20130906171325/@comment-7418318-20130906172058

I guess that Minerva reverted to an age where she still had a bit of boobs left probably means that she's a few years older than the other girls.

I can understand why Orga would be counted as the strongest in Sabertooth. Minerva and Jiemma are no longer part of Sabertooth, so they aren't counted and the Dragon Slayers are too inconsistant and situational (i.e. do they have some of their own element available to power up and nakama power) in their powerlevels to really rate them properly.

Also it's hard to individually rate the twin Dragons when they almost always fight as a team.