User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-121.54.44.94-20151019095821

I would disagree that we would call it Lucy's "fighting spirit". I mean if you really examine that panel where she was about to stab Brandish in the back. She wasn't aiming for a maim or even disable her. She was going to stab it her key in the back of Brandish's chest... which is ding ding ding, where her heart is.

She was definitely going for the kill.

Another plus point in this chapter. Lucy seemed to have the most improved character development where she knew they needed to kill the Spriggan 12 to actually stop them than just wearing them out.