[Reality is sobering, this conversation yet one more reminder that he is powerless so long as he remains on this island, unable to control or change anything around him. Back home in Mondstadt, Diluc was aware that the odds were stacked against him, but at least he had the means to enact meaningful change within it and do his part to protect the only real home he's known.

Here, every action he takes his inconsequential and without meaning... but by the same token, there is no evil here truly worth punishing. If he killed Uta now, she would simply revive some time later with only the psychological scars to show for it. Justice and punishment don't always go hand-in-hand, do they? As she is now, without power or control, Uta is just as weak as himself and just as little of a threat.]

Happiness has never factored into the equation— not my own. All I care about is a future in which the citizens of my country can live their own happy, peaceful lives with as little strife as possible.

[On that note, Diluc rises from the bench and offers Uta his hand. It isn't reconciliation but an olive branch, simple courtesy when Uta has, at least, extended him the privilege of broadening his understanding of people like her. If nothing else, there's some value in hearing other's perspectives.]

Allow me to walk you home.

[Should she take him up on the offer, he'll do just that before heading back home on his own. Until next time, Uta.]