Severus looked at her for a moment, inscrutable. He couldn't think of any reason why someone would ask after Pyrites in particular, which was a little unsettling, but - perhaps he'd learn something, if he listened. "Yes," he said with a nod. "I do - to some degree, in any case. The Death Eaters are not the ... tightest-knit community." He had never made any real effort to seek the man out, either, seeing as they had so very little in common. "And he was several years ahead of me in school. I don't know how much I'll be able to tell you, but you can ask what you like." He kept the why? to himself, for the moment. Pyrites kept a rather public profile, after all - ah. "He is a Death Eater. If that's what you mean."