Her eyes flew open.
She was met with the dead eyes of Luna Lovegood. Whimpering with fear, Hermione's eyes raked across the limp form of her mauled classmate. She was missing a leg, all the way up to her hip. Her arms and her body were covered in bite marks and scratches. And blood. Old, crusty, blood that made Hermione's stomach roil. She closed her eyes, willing it to go away.
It never did. The putrid smell of blood permeated her senses, keeping her firmly rooted to reality. She opened her eyes again. Looking away from Luna, she found herself in a graveyard of the Light side. Everyone she knew and loved was dead. She didn't really register it all until she saw Ron. Poor, sweet Ron.
It was as if someone took the time to break every bone in his whole body. There were cuts deep and shallow covering him, each one crusted over with dried blood. His jaw was torn off, laying a few feet away. Seeing the flies and the maggots crawling, swarming over him was too much. Hermione vomited whatever food rations were in her stomach.
Wiping her mouth, she curled into a ball and fell unconscious.
The next time she awoke, she knew to brace herself. She weaved her way through the bodies, leaving the Great Hall. She decided to go outside for some fresh air. Walking through the remains of Hogwarts, Hermione catalogued each and every body she came across.
She was in the courtyards now. Piles of rubble were everywhere. She heard a rustling behind a particularly large boulder. Dropping into a crouch, she silently crept her way over to the noises. Peering around the rock, she saw a huge vulture pecking at yet another body. Dreading the body's identity, she hesitantly shooed the vulture away. She came closer. When she saw who it was, she broke.
Harry was lying dead on the ground, his green eyes dull. Hermione fell to the ground, weeping and sobbing with great, shuddering gasps.
It had been two weeks since then. Hermione felt she needed to burn the bodies. They were decomposing rapidly. She put them all in the Great Hall, keeping personal items. She started with Hagrid. "Incendio." Lavender. "Incendio." McGonagall. "Incendio." And so it continued, until every last body was ash. With one last flick of her wand, she murmured, "Evanesco," and Vanished the ashes.
Once Hermione was done, she didn't know what to do. She felt lost. The world was probably taken over, in Voldemort's clutches. She couldn't leave, for obvious reasons. Not without a plan.
So she read. She devoured every book, hasty to learn. She read everything, including the Restricted section. She was utterly determined to find something to do. She made sure she mastered every spell, every skill as best she could. She wanted to be prepared to fight. She slept in the Room of Requirement, as it was the only place she felt relatively safe. When she read through the library, she searched through the Room of Hidden Things to find books and artifacts.
She was broken and desperate, and she knew it.