Fai can sense someone stalking him. Even though his abilities as a vampire have been altered, he still has that sense about him. He pretended to be completely obvious though as he continued to hum. He placed his hands in his lap, silently preparing his first spell just in case the person decided to attack him. It didn't matter if there was jewelry or coal in the box. He wasn't about to let anyone have it. All he could hope now was that whomever was nearby was simply passing through and not actually interested in his box.