I like how they have their own terms of "hero" in this. In most mainstream manga/anime, hero are always the same in name, no matter what kind of shit person or good willed guy they are, they'll always be called a "Hero". Yet in here, instead we have the "brave" as the term to refer the good guy. And the term "hero" itself falls to the bad guy. It doesn't necessarily bad, but more like selfish, egocentric kind of guy. The brave and the hero is a polar opposite, one follow the will of other, while the latter follow his/her own will. But no matter on what intention they have and how they act, they save people in the end.