User blog comment:IamJakuhoRaikoben/Chapter 457: Naked Battle, Review./@comment-4999650-20151019120400/@comment-25111584-20151019183317

Confidence in one's powers != arrogance. Brandish is a sloth, which explains most of her actions. She keeps saying that she doesn't want to take part in any of this business because it is too tiresome. That explains all of her actions. Ajeel is arrogant.

Brandish does not consider Lucy to be a threat because Lucy cannot harm her in any way. Brandish could just as well go to sleep in front of Lucy. Does this mean that she has left herself wide open? No, it means that Lucy is so insignificant that she can't even do anything to a sleeping Brandish. And Lucy should be smart enough to realize that instead of immediately jumping at the 'opening'.

This was not a mistake, it was blatant baiting by a woman who was toying with Lucy. Only someone naive would fall for it. ... Which Lucy canonically is. I had originally thought that Lucy would be too smart to do this, making this OOC, but it obviously isn't, so I've already conceded here. ^^