User blog comment:IamJakuhoRaikoben/Chapter 483: The Seven Stars, Review./@comment-121.54.44.94-20160426130009

Regarding Irene, I know this is a shitty theory, what if there's a magic that lets you create your 'bad or evil side', what if she's Erza's dark counterpart?

Then Mirajane would be like, "Erza's my childhood rival, you two might seem look alike.. blah blah" then fights her. Lol