User blog comment:IamJakuhoRaikoben/Chapter 515: I Am You... You Are Me, Review./@comment-4507125-20161221005545

It's not Irene's fault she became hateful towards everything including her own daughter. The man she once loved along with everyone in her kingdom turning against her, that mixed with being tortured, beaten, and being treated like a plague pushed her over the edge.

All Irene wanted was to be human but lost herself along the way do to all the pain she endured. Most enemies who Erza defeated saw the error of their ways, perhaps she can save her mother from her own hell.