[Something twitches across Diluc's face at the mention of Childe, easily missed if Kazuha isn't looking at the right moment. He hates that his feelings towards that particular harbinger are so complicated. Hating him should be easy, but it's turning out to be an unexpectedly difficult task.

Otherwise, he stays quiet. Numbed, almost, by the topic of conversation as he does little else but look down at the blank Vision and lightly move his thumbs against the sides of Kazuha's forefingers.]

I could tell you what I think you should do. [He murmurs a few moments after the samurai asks his question. For Kazuha, who has come to know Diluc as a more gentle and emotionally animated person than he was when he first arrived here from Mondstadt, the change in him must be jarring. There's very little on his face or in his voice to betray his thoughts.]

But I don't think it's something you would want to hear, nor something you would act on if I did say it. I prefer not to waste my words in that manner.