So this is a an idea I had for a RWBY/Harry Potter crossover
Hermione sighed as she lay in the hospital bed. She shifted uncomfortably in the bed; the cat fur that had sprouted on her body made staying still under the cotton sheets difficult. She should have checked to make sure that the sample she had gotten from Bulstrode was safe to use, but she hadn't anticipated that she'd ended up getting cat hair instead of human hair...
"Now Ms. Granger, most of the cures that I have here don't seem to be working on you," Madam Pomfrey said, interrupting Hermione's thoughts, "I may need to contact St. Mungo's for something stronger."
"Now, there's no need for that!" Hermione heard someone shout. the door to the hospital flung open and Professor Lockhart walked into the Hospital. "You see, I already know how to solve Ms. Granger's problem."
"Professor Lockhart? What are you doing here?" Hermione asked.
"Well, I heard from Mr. Potter that you were in the hospital." Professor Lockhart said, "I was curious as to why you were in the hospital, so I listened in to your conversation with Madam Pomfrey, and I learned about your situation."
"Luckily, I know of a way to solve your problem!" Professor Lockhart shouted.
"You do?" Madam Pomfrey frowned, "I highly doubt that, I remember when Mr. Potter was brought in here after his quidditch game..."
"Ah, well that was because I had a different spell on my mind, it was by accident that I caused Mr. Potter's bones to vanish," Professor Lockhart, "But I know the spell to cure Ms. Granger, I've encountered people who suffered from situations similar to hers."
"Really?" Hermione asked, "But you never mentioned that in your books..."
"Yes, well I'm in the middle of writing a new book that details my encounters with those who were under the curse of the Werecat." Professor Lockhart shuddered, "It was a nasty problem to solve, the victims were forced to lick themselves, scratch up the curtains, and drink milk obsessively. The smell of the village was...horrid."
"Ms. Granger was not attacked by a 'Werecat'," Madam Pomfrey said, "I appreciate the fact that you want to help but-"
"Don't worry Madam Pomfrey, I know what I'm doing." Lockhart said as he brushed past Madam Pomfrey and pulled out his wand, "Now it's time to get rid of all that hair Ms. Granger, Hairus Vaniush!"
Before Hermione knew it, Professor Lockhart had swished his wand through the air and had cast a spell on her. She'd shut her eyes, as she remembered what happened when Lockhart had tried to help Harry, and she was worried that the professor would only make things worse. After the spell washed over her, her skin felt as though it was tinging. She opened her eyes to see that Lockhart had put his wand in his pocket, and Madam Pomfrey was looking at her in concern.
"Oh, you managed to get rid of the fur, and you removed the tail as well!" Madam Pomfrey said, "Though it looks like there's still a few problems..."
"Yes, well I have another spell that I could use." Lockhart said, "If you'd let me-"
"No, I think that you've helped quite enough." Madam Pomfrey said, "I can handle the rest, don't you have a class to get to Mr. Lockhart?"
"Well, you do have a point." Professor Lockhart said as he put his wand back in his pocket, "Although..."
Lockhart smiled, "Ms. Granger, if your friends ask you who solved your...hair problem, you should tell them that I'm the one who helped."
"I mean, just look at your skin Ms. Granger, you're practically glowing!" Lockhart said, "That's certainly praise worthy!"
"Mr. Lockhart, I think that you-" Madam Pomfrey paled as she looked at Hermione, "Oh...oh no."
"W-what?" Hermione asked, "What's wrong?"
"Ms. Granger I need you to stay calm," Madam Pomfrey said as she moved towards a medicine cabinet, "I don't know what Mr. Lockhart did, but I'm going to have to reverse the effects."
"What did he..."
That was when Hermione saw it. Professor Lockhart wasn't just complimenting her when he said she was glowing. She stared at her arm, and she saw that it was brightly glowing. Evidently, she must have made some sort of sound, because Madam Pomfrey turned to look at Hermione.
"Ms. Granger I know that you're frightened but you need to-" Madam Pomfrey's mouth was moving, but Hermione couldn't hear anything that she was seeing. Her surroundings seemed to be getting brighter and brighter, to the point where she couldn't see anything. This, combined with everything that had happened to her today, proved to be too much for Hermione and she passed out...
Davis Marshall startled awake in his bed when he heard a loud crashing sound.
"What do you think that was?" His wife asked.
"Probably that Raccoon Faunus again." Davis said as he climbed out of bed, "I think I'll have to buy more traps."
"Where are you going?"
"I'm going to have to chase it off," Davis said, "Otherwise it's going to keep us up tonight."
He left the bedroom and went downstairs. He slipped on some shoes and opened the sliding door that lead to his backyard. The garbage can had tipped over, spilling garbage all over the grass.
"Seriously?" he said, "I'm going to kill that stupid-"
A sudden groan caught his attention, and that was when he noticed the girl that was lying on top of a few garbage bags. Because it was dark, he couldn't see her clearly as she shakily pushed herself off of the garbage bags. She looked around the backyard, before turning back to face him.
"Ah, excuse me." The girl said," But I'm not sure where I am."
"You're in Vale." Davis said, "One of the kingdoms of Remnant."
"Vale?" The girl tilted her head, "Is that anywhere near England?"
"England?" Davis blinked in confusion, "I've never heard of a kingdom called 'England'."
"It isn't a kingdom, it's a- achoo!" The girl stopped in the middle of her sentence and sneezed.
"It's cold out here, why don't we go inside?" Davis asked, "Then you can tell me more about yourself."
"Thank you," The girl said and as she walked towards him, Davis was able to see the cat ears on top of her head. "I-"
"Y-you're a Faunus!" Davis took a step back in surprise.
"A...what?" The Faunus seemed to be confused, "I'm sorry but what is a 'Faunus'?"
Davis ignored her question and rushed back inside his home. He shut the sliding door and ran upstairs, startling his wife.
"Davis, what's wrong?" his wife asked.
"There's a Faunus in our backyard!" Davis shouted as he grabbed his gun off his shelf, "Call the police, I'll handle the Faunus until they get here!"
Hermione was confused when the man suddenly fled into his home, she wasn't sure why she had frightened him. Also, why did he panic when he realized that she was a 'Faunus'? What did the word 'Faunus' even mean? She knew that Faunus was the Roman god of forests, wild and nature, but what did that have to do with anything?
"Hey!" Hermione ears twitched as she heard someone hiss, "Why the hell are you just standing there?!"
She turned around to see a boy who seemed to be a few years older than her. He had grey hair, and he was wearing baggy grey T-shirt and tattered jeans, he also had a black mask on his face.
"Who are you?" Hermione asked.
"That isn't important," the boy, "What's important is getting away before the VPD gets here!"
Sirens howled in the distance, and the boy cursed.
"Look, if the VPD catches you, they aren't going to go easy just because you're a girl." the boy said, "You've heard the rumors, right? They'll beat a Faunus black and blue if it means they can get a confession!"
"There you are!" The man who had rushed into his home outside holding a strange looking gun in his hands. "I should've guessed that you two were working together!"
"Wait, I think that there's been some kind of misunderstanding!" Hermione shouted, "If you put down the gun, I'm sure that we can-"
The boy with the mask tackled her to the ground as the man fired his gun. The bullet whizzed over her head and hit the fence in the backyard.
"Damn!" The man shouted as he missed. He reached into his pocket for more ammo.
"Okay, we have to leave, now." The boy said as he grabbed Hermione and darted away from the man with the gun.
Several more gunshots rang out as they ran, luckily the man was a horrible shot and the bullets whizzed past her head.
"Where are we going?!" Hermione shouted as they ran.
"There's a manhole near here!" The boy shouted, "We're going to enter the sewers and wait until the heat dies down."
Hermione's lungs were burning as they ran, and she felt as though her legs were going to give out. It only took them about eight minutes to reach the manhole, but those eight minutes felt like eight hours instead.
"Okay, get in." The boy said as he pulled the manhole cover away, "I'll go in right after you."
Hermione climbed down the ladder that lead to the sewers, and the boy soon followed her once he covered the manhole. With the manhole covered, the only source of light was gone, drenching the sewer in darkness. Within a few seconds, her eyes easily adjusted to the darkness, and she was able to safely make her way to the ground.
"Well, that was an experience." The boy said as he got off the ladder, "We'll have to lay low for a while, they'll be looking for us."
"Excuse me," Hermione said, "Do you know why that man shot at us?"
"...It's because we're Faunus," the boy said, "If we'd been human, he wouldn't have called the police and he wouldn't have tried to kill us."
"But...I'm a human." Hermione said.
"Did you hit your head or something?" the boy asked, "You're a Faunus, last time I checked humans didn't have cat ears."
"Cat ears?" Hermione's face paled as she rose her hands to the top of her head. Her hands brushed against something warm and fuzzy.
"Are you okay?" The boy asked, "You don't look so well..."
"I-" Everything that had happened during the past few minutes caught up with her, and Hermione fainted for the second time...