So much of Taki and Klaus' interactions pre-japan are soooo tender and sweet and domestic. It's all 'Klaus cooking taki's favorite foods' 'Klaus and Taki washing up together' 'Klaus defending Taki from people who want to take advantage of his naivete/cultural ignorance' 'Klaus telling Taki cute stories from his childhood' 'Sex that focuses on Taki's pleasure.'
But once they get to Japan all of that disappears, and the only way he has left to show his love is Violence. Hurting others or hurting Taki, is that 'Love'? Of course not, he knows that, but it's all he has left. Because of war but also because they're no longer equals in Japan. Taki is nobility but more than that he's practically a living saint. And Klaus is just a badly trained foreign dog. So he can kill Enemies (good violence (tm)) or he can attack Taki (bad violence (tm)) but he can never approach Taki as an equal, as a mutual lover. Every touch is violence because it comes from an inferior.
'Being your sword is the only thing I have to be proud of.'
