"He'll talk if you get him in the right mood," Ylva says. "I dunno. I don't think he likes me very much but he does seem to like some people. A lot of people think maybe, if we can't kill him, we can change his mind. One way or another."

She frowns, thoughtfully. "Look, this isn't the first time I've been in a weird plane of existence. First time I've been so trapped, though."