This was a hard watch, so many conflicting ideals were on full display in this episode. In a way Kou, is right killing a person should weigh on you even if it was in selfdefense. Not something to revel in, though the backstory of Noboru clarifies that she isn't a blood thirsty warmonger as we first thought. Matter of fact if it was for context Kou would probably have felt worse about killing those soldiers. In a way Kou was lucky these soldiers were cartoonishly villainous if they had complicated life stories like Noboru we'd sympathize with them as well.