"Oooh, a Protean Charm? Can I see the coin?!?" Su's eyes had lit up just at the sight of it, and she could feel her fingers itching to get a look. She also had the strange urge to hold the coin and start going 'myyyy precioussss'. What? Proteam Charms were brill and she'd heard Hermione had done it when she was only a fifth year!
Turning towards Kevin, she suggested, "We could at least start with our former Housemates? I've seen a few of them around. I'd say journals are the best way to start, because we can disguise our signatures. We could even post something just mildly inciting, just to see how people react to it? That might be dangerous, though."