[ Her faith in Karsa runs in complete opposition to how much Five has always hated her. Even if she has been technically their most reliable ally, and he knows for a fact that the Merchant scarred her for life, she ruins his sympathy every single time he's spoken to her. ]

I think it's not her primary objective to make things easy on us. [ And that's always bothered him. Karsa's motive is no less a mystery now than it was years ago when he made a concerted effort to find out what it was. ] I've never figured out why she stayed. The Merchant doesn't even pay her, so he must have something over her.