"Juliet's story is several thousand years old," he says, "but a brief sketch: my world is overrun with all sorts of nasty bitey creatures, of which vampires are perhaps the most numerous but by no means the only. A long time ago, some collection of magic-wielding people with bizarre priorities decided to dump a lovely package of superpowers onto a teenage girl and make her fight off the nasty bitey hordes for them, with the superpowers then passing on to yet another teenage girl when the first was inevitably killed in the line of duty. Juliet is the latest such person; they're called Slayers. I am currently acting as her bodyguard and martial arts instructor in the hope that she will live past twenty-six, which no other Slayer has ever done."