Saddest death in this manga, i would say... What a life Grimmer had... And when Franz/Poppe knelt... In turn, this was one of the best moments of the manga.
Grimmer is a character with a special trajectory, is really unique and I would say that is one of the best achievements of Urasawa in this manga, creating such a memorable character... His character, his way of being, his way of behaving.
His final words sink deeply profound in one, knowing what it really means, and how his journey finally ended. His goal finally achieved... He was able to cry for his son, but not live beyond it after finally achieve that... A tragic character, to demonstrate better than ever what Franz/Poppe did... That there he kneels to witness the atrocity he did.
I insist, this last volume is being the best of the best.