User blog comment:IamJakuhoRaikoben/Chapter 459 & 460: Weakness & The Alighted Pegasus, Review./@comment-203.111.234.105-20151101162256/@comment-7418318-20151101162657

Not having any weaknesses doesn't mean you are strong.

If someone is average in every way, that person doesn't have a weakness either, but is still just average and not strong.

Not that I think that Mira is weak or average... she's certainly strong, but it has little to do with not having any glaring weakness.