User blog comment:IamJakuhoRaikoben/Chapter 366: 1000 Souls, Review./@comment-4999650-20140109175131/@comment-3290324-20140109185542

That's the thing though, you aren't looking at the whole picture. Let's say that there was any doubt after seeing Erza tortured naked whether it was for fanservice or not, as soon as that random, useless tentacle monster showed up, it was clear what Mashima's purpose was.

My bet is on either father or brother.