User blog comment:IamJakuhoRaikoben/Chapter 477: Transport, Review./@comment-121.54.54.156-20160314203442/@comment-7418318-20160315074859

If you think about it so far in this arc Mest was pretty much a faster but less resilient (yeah... ridiculous, but unfortunately true) version of Happy.

He's only good for transporting people around and delivering messages.

I wonder why no one ever got the idea of manipulating Brandish's memory to make her think she's on Fiore's side and make her fight against Alvarez that way.

Or if that's too morally questionable, plant her with a false memory giving her "proof" of Fariy Heart being hidden away on the other side of the world, to make their army chase in the wrong direction for a long time and thus buying time to improve their defenses against the invasion.