In the cold and the dark, Hermione remembers the look in his eyes when he had shoved her against the wall in the Death Eater residence on that mission, arguing. She hadn't known if he was going to hit her or kiss her, and then the spell had struck right by her head and nearly killed her and his face had turned to stunned horror. She remembers the twisted pleasure on Draco's face, the boyish, excited glee at the sound of that same Death Eater's ribs crackling like kindling under his vicious kicks. Because the Death Eater had tried to hurt Hermione, and Hermione was Draco's.