He stops himself from responding to that answer, while Hiei wasn't wrong, that still didn't make it his problem, but there's no sense in rehashing that point when he's said as much already. They'd just keep going in circles about it.

Kurama pauses as the fire demon continues, head tilting slightly while he clearly struggles with whatever is on his mind. The growl also isn't much of a surprise coming from Hiei, but what follows- leaves him speechless. The redhead doesn't respond, doesn't move, just stares wordlessly for a moment. Hiei did not want to talk about this and now not only is he doubling back, but doing so to apologize, of all things.

After a moment green eyes lower, trying to think of some response and still coming up with nothing. Hiei didn't want to be thanked, the fox couldn't imagine reassuring him that he had nothing to apologize for would be taken any better, either.