User blog comment:Ncduru/The Erza-Irene Connection/@comment-24784846-20160427172729/@comment-73.191.17.103-20160430043721

A very good theory that has been floating around on Irene was that SHE was one of the 12 that invaded Ishgar when Zeref told them not to. Maybe to find Erza and rejoin with her, if they are the same person and not mother-daughter