Mercy
In the Battle of Hogwarts, the last person Harry expected Voldemort to focus upon was Hermione. He regretted that immensely.
"Please!" Harry cried desperately. "Just don't-"
"Hurt her?" the Dark Lord hissed silkily. "Why ever not? It's just so easy to-" He flicked his wand slightly and Hermione collapsed to the ground, screeching in pain. Harry flinched at the spectacle of her mangled arm.
"Please-"
"Beg Potter! I want to see you beg! Get on the ground and beg for the life of the woman you love!"
Harry fell to his knees, glasses sliding of his nose in a morbidly comical sight. "Please! PLEASE! I'll give you anything! Anything…"
"Well doesn't this bring back memories? Dear Severus, pleading for the life of- why! I do believe it was your mother! Not that it did that filthy mudblood much good."
There was a loud chorus of jeering laughter from the gathered Death Eaters.
"This! This is your saviour!" Voldemort addressed the deathly still crowd of Hogwarts students, teachers, and Order of the Phoenix members. "Snivelling at my feet, bowing to my power. Where he belongs."
That statement seemed to ignite the last flames of strength in Harry, and he began to struggle to his feet. "I don't-"
"Ah ah ah! Naughty naughty Harry. I did warn you." Voldemort scolded lightly. "Crucio."
Hermione shrieked and convulsed in agony, blood trickling from the corner of her mouth. Harry started crawling towards her, but Voldemort kicked him cruelly and the Boy Who Lived fell, rolling onto his back, eyes glassy with horror.
"Love did this to you, boy," the Dark Lord sneered. "It's a weakness, no matter what your precious Dumbledore thought. And where did it get him? Dead. As dead as you shall be. And you can die safe in the knowledge that your precious mudblood Granger will follow soon after. But not too soon. Maybe I'll let Fenrir play with her. He's been dying to have a go, after all. And Lord Voldemort is nothing if not kind to his loyal followers. See! Your love will live but a little longer. How merciful Lord Voldemort is."
Voldemort took a step forward, gliding over the blood-stained grounds of Hogwarts. He leaned over slightly, towering over the Boy Who Lived, who glared up at him in defiance. "But for now, goodbye Potter. You never were much of a match." His ruby eyes flashed cruelly as he raised his wand, all attention focused on Harry. "AVADA KED-"
And then, he stopped. Looked down at his chest, where the tip of a blade emerged smoothly from between his ribs. And letting out a breathy laugh, he fell.
"Love is anything but a weakness," Hermione spat. "And your mercy was misplaced."
"Hermione!" Harry breathed, and ran into her arms, sobbing with relief.
"Hello love," she whispered. "It's all over now."