It would have been inconceivable if he was. Seth was never late. Of all his sins, a failure to be punctual couldn't be counted. So he materialized out of the darkness to stand behind Kitty (there was no power at work, just his own knowledge of how to be creepy) to say: "Hello, Katherine."
"Or Kitty, I suppose. Whichever you like." Seth flashed teeth in a smile as reassuring as a smile, taking his hands out of the pocket of the black peacoat her was wearing over black trousers.