Potter exhales slowly and swallows. "Stay away from her, Malfoy." His voice wobbles slightly. "The healers say you and your house are her main triggers. If you hang around her, she will inevitably relapse again. Every time they have to re-obliviate her, it’s going to carve away a little more of her mind and memories. If there’s even a shred of anything decent about you, stay away from her."