"Ah... all right. Yes, it'll be better out in the desert, I can see that."

Embarrassed, a little, but also he doesn't know how soon he might need to use his powers. So in some ways, the sooner he starts, the better. But what Knives says makes sense, and never mind that this time, 'little brother' makes him feel something soft and warm inside, something he'd mostly given up on feeling ever again.

He swallows, then laughs quietly. "He probably would, he does rather work with you, well, he does where I am from. You would tell him to take a plant, and he would collect it."

Beat, and Vash looks up, making a face. "What happened to the fifth moon, anyway?"

Because his one is certainly not like that.