Harry and Jayne
Harry didn't even feel it just at first. He blinked and suddenly pain exploded across his neck. He managed to turn his head to stare in disbelief at Jayne, but he couldn't see what she'd done, what she'd stabbed him with. Cold spread through him next, and he staggered back groping automatically for a wand he didn't have. If only he had skill in wandless magic, nonverbal magic, something to help right now.
Instead he dropped to the cold floor, but even as he started to breathe shallowly, he felt something strange. Something in his mind gathered, seeped out, and coalesced, hanging in the air like a cloudy question mark. The very last thing Harry Potter saw was another set of features briefly superimposed on Jayne's face.
Twenty two years to the day after Voldemort had failed to kill Harry Potter, this woman had succeeded, and Harry didn't even know why.