User blog comment:IamJakuhoRaikoben/Chapter 459 & 460: Weakness & The Alighted Pegasus, Review./@comment-203.111.234.105-20151101162256/@comment-5894890-20151101193104

I'm just going to point out, I do think Mira has weaknesses (though I guess they're not actually weaknesses, since they require special abilities to exploit), but ones that I don't think Mashima would include. That being said, she is one of the least weakness-succumb-able people :P. Like Erza, who you would normally think doesn't have much weaknesses due to her versatile magic; access to a bunch of elements and special armours (besides maybe a magnetic user or something lol)... anyways look what Marin did. For Mira, it could be something like the magic of the Coordinator in the movie, or some OP ability to deal extra damage or track down non-human forms o_o.