It's amazing how this manga is ending.
So that's Roberto... Adolf Reinhart.
It's really well thought, as several really relevant characters were seriously affected as children in the Kinderheim, 511 and in turn have lived a miserable life, as Roberto said, the best moment of the week in that orphanage was when they brought him his glass milk with warm cocoa... Really, all this makes one sympathize with the characters, which leads one to think about what kind of suffering Johan could be feeling inside, already knowing the contexts of Grimmer and Roberto, it makes one think... And it makes more sense that Johan is the most brutal case of all.