dark will always take up immediate issue with those who mock love or emotion as weak i think. irrational at times? sure, he can agree. sensitive, vulnerable? absolutely; inherently, (as a synonym for sincere,) but the moment someone starts legitimately calling love a weakness or an exposed vein only meant to be punctured and drained from, that's when he starts to get angry. dark, as someone who already bears an inherent callousness and apathy, who knows just how easy it is to be cruel, destructive and belligerent, always admires daisuke for the boy's heart and tender, stubborn emotion. like sugisaki's interview mentions, dark is likely someone who bears continuous witness to and understands just how much intense effort can go into someone doing their best in trying to be kind to others; he thinks that he himself never could, at least not even close to the same way that daisuke steadily tries to maintain. those that would mock or scoff at daisuke's, if not the overall idea of kindness, dark won't hesitate to snap at and call weak, pathetic, or cowardly in return. those who prey on others' feelings and scorn or abuse them aren't proving that kindness is a 'weakness;' they're only fouling good things that could have even otherwise been their own with their own 'malicious crap and garbage.'