User blog comment:Miskos3/Fairy Tail 519: Show Me Your Smile, Review/@comment-5894890-20170129173126/@comment-7418318-20170129211526

So next time we see Irene and Erza, it'll turn out that Wendy did some emergency healing to Irene. Irene will ask why they would show her mercy, will have a heart-to-heart with her daughter and after returning the continent to it's original shape will leave on a journey because she feels she doesn't have the right to face her daughter as she is now.

Typing that out makes it sound like she'd be a top candidate to join CS... but apart from having lost all relevance in the story, they are pretty much at the destination of their own journey.