User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-4999650-20151019120400/@comment-175.142.90.206-20151019234921

@Sane, actually i think Brandish wasn't really on guard with Lucy at all during this chapter. Think about it,


 * 1) Marin was there = Lucy can't use her magic.
 * 2) Brandish made Lucy strip naked = reduces the chance of hidden weapon like daggers
 * 3) Brandish magic can affect the entire town = Lucy can't disobey her.
 * 4) Marin being sealed inside a capsule = no one to warn Brandish if Lucy tries to kill her.

So it isn't all that surprising if Lucy somehow injured her in this chapter.