Remus/Hannah
Well three of them were literally servents of You-Know-Who, two of them might as well have been.
About that [...] I don't want to freak you out or anything but Dumbledore trusted you, but one Professor, a twat but you didn't hear that from me, decided to out you to the entire school. I'm telling you this because I'm hoping you'll trust me. There's a potion that can help you, and I know how to make it.
No, I don't believe so or they haven't made themselves known on the network yet.