[ No doubt Suigetsu is more familiar with and comfortable in fog than he himself is. The majority of memories that he associates with such conditions are decidedly negative, after all. ]

Good. You'll be more useful with a weapon like that. [ And naturally everything he says comes across as unnecessarily harsh, but to be fair it's true. ] Until we know more about what we're dealing with we'll stay together. [ Sasuke enjoys splitting up, what can he say. ]