A/N: This is supposed to take place while Rose is travelling with Ten, so when she talks about losing someone she means the way she almost lost the Doctor in "Bad Wolf"/"The Parting of the Ways."
Summary: The Doctor and Rose somehow enter the Harry Potter series and become acquainted with the main characters. Rose has never read the books but finds herself sympathizing most with Hermione (even if she is a bit of a know-it-all). One night, she finds the witch in a forest and realizes that despite their differences, they have a lot in common.
Disclaimer: I disclaim everything except the writing. 3
Rose heard the sobs before the saw Hermione, seated on a log, her face buried in her hands and her shoulders shaking.
"Oi, Hermione – that you?" Rose called, rushing quickly to the girl's side. Hermione looked up, momentarily panicked, but that disappeared as she recognized Rose.
"He – he left!" she sobbed, wiping her eyes with her sleeve. "R-Ron – he just..left!"
Hermione told the story as best she could while Rose sat next to her and put an arm around the girl's shoulders.
"Oh, Rose," Hermione sniffed, "I'm so scared. What if something happens and he's not here? What if he gets hurt and he's all alone—" She broke off, her body wracked with sobs. She allowed Rose to hold her, and when she spoke her voice was muffled by Rose's jacket.
"What am I going to do?"
They sat there, bathed in the moonlight, with Hermione crying quietly as Rose stroked the girl's hair and fought back her own tears.
Because she knew what Hermione was going through. She knew what it was like to lose the person you cared about – to have them so far away, to feel helpless and alone and scared.
And she also knew how to overcome the despair she knew Hermione was feeling; the very same despair that had rooted itself to Rose's soul and almost consumed her. She knew how to beat it.
"I'll tell you exactly what you're going to do, Hermione Granger," she said with such resolve that Hermione sat up, staring at the woman who travelled with the strange man.
"You're going to fight, Hermione," Rose told her, "Because you've got to. Because you can't go to that dark place. I know it. It's easy to get lost in it, to just give up, but you can't. You've got to fight, for Harry and for Ron and most importantly for yourself. Show the darkness how strong you are. It hurts Hermione, I won't lie, and the darkness will be there every step of the way, but if you go down that path, you won't come back. So be strong and fight so that when you find Ron – and you will, I promise you – you can show him exactly why he should never leave you again." Rose smile, and Hermione found her lips curling up in response. "You'll do that, won't you Hermione?" Hermione nodded fervently and enveloped Rose in a tight hug which Rose gladly returned.
"Thank you, Rose Tyler," Hermione whispered.
Rose smiled into Hermione's bushy brown hair, only pulling away when she heard a voice cutting through the silence of the forest. It was the Doctor calling out to her.
"Coming!" she called back. She took one last look at Hermione.
"You'll be alright?" she asked. Hermione nodded, and Rose grinned.
"Of course you will!" she said brightly, then ran off to find her Doctor.
"Does he come back?" Rose asked once they had returned to the safety of the TARDIS. The Doctor blinked down at her.
"Does…does Ron come back?" she asked again in a smaller voice. Suddenly, she was afraid of the answer.
But the Doctor, looking at her with that wonder in his eyes she knew he saved just for her, smiled. She smiled back and reached out to take his hand.
'It's worth it, Hermione,' she thought. 'Believe me, the fight is worth it.'