User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-4999650-20151019120400/@comment-25111584-20151019190849

Nick, this isn't about Lucy's attacks not working, it's about Brandish being able to easily repel them. If Brandish falls asleep in front of Lucy, it means that Lucy is so weak that any attack she tries will be easily thwarted. She wouldn't be able to get past Brandish's guard.

If Lucy tries to stab Brandish with the key while the latter is voluntarily not looking at her, do you really think Brandish would not realize Lucy's intentions and easily allow herself to get killed?