"How touching", came a sarcastic, unfamiliar voice from her left. As Hermione turned her head, she saw a burly man walking up to Severus with a curious gaze fixed on her own face. Her eyes flickered across his features, trying to pick out something recognisable about the man. After a beat, she frowned. She most definitely did not know him, so... what was this all about? As he watched her, he leaned down and just as she thought he might be about to say something to Severus, he punched him suddenly in the stomach, causing him to double over with a grunt as Hermione gasped in horror. The stranger’s expression shifted into something between amusement and calculation as he took in her reaction. "Fascinating. I would hardly expect one of the Golden Trio to care all that much about your temperamental old Potions professor..."