Is that not what a mercenary does? Act alone?

[ He may not admit it, but she will. So, excuse her Cloud, while she calls you out on your statement. ]

Or do you work with a partner? If you do, then I apologize for my assumption. [ Somehow though, Serenity has a feeling that he has no partner. It's also another way she's trying to divert the attention to the fact she is alone in the castle of her dreams. ]