The Department of Mysteries was certainly not the easiest place to work. Regulus had colleagues even he had never met, because they were so reclusive. He himself, surprisingly, was not one of those people. That is, he almost never associated with his colleagues outside of work, but he could talk about experimental magic and the mysteries of the universe all damn day, and often did.
He tended to distrust any meal provided to him at work, so he'd brought his own sandwich, and was sitting a few tables away eating it when he heard Lisa mumble something. He glanced over at her; she seemed vaguely familiar from somewhere else, and he definitely knew her as the newest Unspeakable, though they hadn't really spoken yet.