I'm not entirely sure if this is all canonly correct, but I like the idea. :)
Remus sat in front of her window. Dumbledore gave her a room all to herself, and it was the greatest thing in the world. She got a job down at Hogsmeade, and saved up money to buy herself some small decorations. Today, however, she was bored. She had nothing to do, and there hadn't been any word from her friends in the past three weeks.
She decided to go exploring. It was only five minutes into walking around the school that she ran into a tall man with long red hair.
"I'm so sorry." She muttered. "I didn't know anyone else was here, and I was-"
"Are you Remus J. Lupin?" The man asked.
"Yes." She said and blushed. He had to be one of the staff. They all knew her name, and it was surprisingly not because of her lycanthropy. Her brains set her apart from most students.
"I'm Teddy Damocles the new Defense against the dark arts professor."
Remus shook his hand and smiled, "It's nice to meet you, Professor."
"Are you dying of boredom?" He asked, clapping his hands together. Remus shook her head yes.
"Why don't we get out of here? Have you been school shopping yet?"
"No, sir, but Dumbeldore usually-"
"Ah, I'll tell him where we're going. Besides, I am not going to Hogsmeade. It's even more boring then this place. I mean, have you even been to the Shrieking Shack?"
Remus laughed on the inside. As a matter of fact, she had given the shack its name.
"I have. It's just an old run down shack."
"Exactly." Damocles said, and he was off. He kept talking as he gathered his bags. Remus looked around his room. It was so much nicer than how the last DADA teacher had it. It was full of light, and there were creatures in cages all around. This year was going to be great.
"Right then. Ready?" he asked. Remus shook her head, and suddenly they were in Diagon Alley. Remus took some more of her money out of Gringotts and then they went to get her uniforms.
Remus couldn't help but notice how much she had grown over the past year and this summer. She was finally out of that awkward pup stage. She was now five feet and four inches and, even more surprisingly, she filled out the front of all her shirts. She bought her clothes, and then Damocles took her to a Muggle restaurant. He talked the entire time about everything and anything, and finally, he started quizzing her on DADA since he had heard about her skills.
"Alright. What's a boggart?"
"It's a creature that can physically turn itself into your worst fear, all you have to do is think of your fear in a funny form, and say, Riddikulus."
"Amazing. How do you know that?"
Remus shrugged, "I love reading."
"Okay then, a more difficult one. Tell me all you know about werewolves."
Remus almost spit out her drink.
"We aren't supposed to learn about those until sixth year."
"Yeah, but what do you know now?"
"Well," Remus wanted to say, "Her name is Remus J. Lupin, and she is sitting across from you", but somehow felt that that would be rude.
"Werewolves are humans infected by lycanthropy. You can only be infected if a werewolf on the full moon bites you. Anything can kill a werewolf, not just silver, like the Muggles think. Not much is known about werewolves besides that. People don't know if the disease can be passed along genetically or if younger kids can even survive lycanthropy. I do know that the change is extremely painful, and that a werewolf cannot control itself during its transformations. If there is nothing around for it to fight or hunt, it hurts itself. It bites and tears and can even try to kill itself."
She went quiet and took a long drink of her milkshake. Then, realization hit her. She had just said that. All of that. Every single word came out of her mouth. And Damocles was staring at her.
"Remus."
"I want to go back to Hogwarts now." She said.
"Remus, please, I'm not going to-"
"I want to go back to Hogwarts, please." She said again.
He grabbed her arm, and they appeared back in his room.
"Remus," he said once more, his hand tight on her arm, "I already knew."
"What." She breathed.
"Dumbledore already told me. Have you ever heard my name before?"
"No."
"Ever since I met Fenir Greyback I've been studying lycanthropy."
Remus could have sworn that her heart stopped. Fenir. That was the man that bit her. She never knew why, all that she knew was that at five years old, she was bitten on the calf by a werewolf.
"I'm a potioneer specializing in werewolves and other magical…creatures." She knew he was going to say beasts but stopped himself. He must think of her as a monster. He was going to hunt her, kill her, or experiment. Or even worse. He could expose her to the Magic Community. Everyone hated werewolves. She'd never get a job. She'd never marry.
"Remus, I'm here to help you."
"Piss off!" she yelled, trying to pull herself from his iron like grip. Her wand poked her in her back. She couldn't do magic, not again, but if it came to that, she was willing to.
"Remus, please."
"Tell me." She spat, "How you plan on helping a monster like me. Stake to the heart?"
"No." he said, his eyebrows knitted together. His eyes seemed so soft, so blue, but how could she believe someone like him?
"I'm not going to kill you. I want to help you. I want to find a potion or make one that'll help you through your transformations." Damocles eased up on his grip, and Remus wrenched away. She faced the bright windows that didn't seem so great anymore.
"Do you think you can find a cure?"
"Sweatheart," his hand touched the top of her shoulder, but retracted quickly. "There is no cure."
No cure.
No hope.
Maybe he could make it better. Easier. The transformations had been getting worse lately.
"What do I have to do, to help you?"