User blog comment:CNBA3/Erza Scarlet vs Iron Man/@comment-25693405-20150429004644/@comment-25693405-20150429011615

No, because if you look at what at all the BS Erza fights (like vs Azuma), I think she's something else. I'm not sure what exactly, but I keep waiting for Mashima to make that revelation. Especially given her power as a child, Erza being human doesn't seem logical, unless she's immortal like Zeref or something.

(It's my personal theory that she wasn't killed in the Tower of Heaven rebellion because they couldn't kill her, but I could easily be wrong)