It's Where My Demons Hide

Disclaimer: I own nothing.

Summary: "It's a darkness, but it's different." Lydia hesitated, watching as Dr. Deaton raised an eyebrow, a frown settling on his features. She sighed,"What if, when Stiles came back... what if he brought something back with him?"

Rating: T

I've always wondered why demon!stiles stories only show up within the perimeters of the Sterek ship. Demon!stiles is one of the most interesting things I've seen in this fandom, and I had this idea in my head for a few days now. I hope you enjoy and let me know what you think.

Lydia Martin brushed the stray strand of strawberry blonde hair away from her face, smiling in accomplishment at the reflection that beamed back at her. She took pride in her appearance, especially that morning as she had had one serious case of bed head that morning.

Smoothing down her pretty white dress, she grabbed her books from her locker and shut it, turning on her heels to head towards Allison's locker.

School seemed so much less important nowadays, now that she knew the real dangers of Beacon Hills, knew of things far scarier than teachers and grades. Of course, she kept her grades at perfect As, accepting nothing less of herself, but making an impression as she strode confidently through the halls of the school she once ruled with an iron fist wasn't something she set time aside for in recent weeks. Now her biggest worries were getting through the school day without having to run for her life, or find her missing friends.

On her way to Allison's locker, Lydia was forced to pass by Stiles's, and paused at the corner of the hall. The tall boy was standing there in front of his open locker, doing nothing more than just staring into it. He was blinking tiredly, and she saw him sigh heavily before he shook his head and retrieved a book, tucking it under his arm and shutting the door. He turned and caught her eye. Lydia gave him a shy smile, feeling the heat rise in her cheeks. She hadn't really spoken to him since their kiss, which had been a week ago. The gash on his forehead from the crash was beginning to heal, but the dark circles under his eyes which had been there ever since were still present, standing out against his pale skin.

She wondered if he was getting any sleep at all, her smile wavering as he stared back at her. Finally, he managed to crack a small smile, a small smile that promptly dropped when arms slid their way around her waist. Lydia turned her head to avoid Aiden's lips, and received a kiss on the cheek. She tried not to grumble, and turned her eyes back towards Stiles's locker to see him halfway down the hall, not looking back.

She sighed, turning her attention to Aiden and untangling herself for him. She plastered on a smile,"Good morning."

"Morning, babe." Aiden beamed, leaning in to place a kiss on her neck,"So, I was thinking, we skip first period and spend it together."

Lydia didn't have to guess why his eyebrows rose in such a suggestive way, or why there was a smirk on his face. She fought the urge to roll her eyes and shook her head.

"I can't. Allison needs to talk to me and I can't miss first period today. But, uh... I'll see you later, okay?"

"You have to leave me so soon?" Aiden pouted, keeping a firm grip on her hand,"Why don't I come talk to Allison with you?"

Shit, Lydia cursed silently, and instead grinned,"You could, but we'd only be talking about girl things. Shopping, makeup, stuff like that."

"I can live through it." Aiden smirked, kissing her nose.

"And, uh... girl problems..." Lydia added,"Yeah, Allison is having some trouble, so, she really needs her girlfriend right now. I'm sure you don't want to be around for that."

Aiden grimaced,"Definitely not. Okay, I'll just have to wait until lunch to be with you."

Lydia hummed in agreement, finally accepting the kiss that Aiden had been trying to get all morning. She pulled her hand from his and flounced off down the hallway. Turning around the corner, Lydia stopped, and leaned back against someone's locker. She sighed, shutting her eyes and trying to block Stiles's crestfallen face from her mind. She also tried not to be so annoyed at Aiden. It wasn't his fault for expecting more from her. She was his girlfriend, she could at least pretend to be happy to see him most of the time, even when she wasn't. Aiden was okay, once she got past all the Alpha Pack issues, but he wasn't what she wanted. What she wanted had walked down the hall, walked away from her. Aiden was what she tried to want. Groaning, she let her head fall back with a soft thud.

"Uh, excuse me?" A short boy with braces and a red face caught her attention,"You're standing in the way of my locker."

"Oh, sorry." Lydia apologized,"Hey, you wouldn't happen to have seen a tall boy, dark hair, looks really tired, wearing plaid?"

"Y-yeah, I think so."

"Did you see where he went?" Lydia asked, gripping the freshman's arm.

"I think towards the fountain quad. I'm not sure."

"Okay, thank you!" Lydia beamed, and took off in the direction of the boy.

She needed to make sure he was okay. Even though she was afraid to admit just how much, she did care for him. So much it was scary sometimes. It had been a slow development, but the feelings were there, and she hadn't stopped thinking of their kiss ever since it happened.

On her way towards the quad, she thought back on all the instances of the past week that she found herself seriously worried. He had been distracted all week, yawning his way through classes and either zoning out during lunch (where they all sat together now) or not showing up at all. Scott had expressed his own concern, saying how whenever he got in contact with his best friend, the conversation was extremely short and awkward. Stiles had begun distancing himself from their group, from everyone. Scott had confessed that Stiles's father had even asked Scott if there was something else going on.

Lydia had come to school that morning wanting to talk to him. She was already sure it had to do with the darkness Dr. Deaton had warned them about, but she didn't know exactly what was happening, and it was concerning her. She had never known Stiles to ignore her. That little smile had been his first acknowledgement of her in days.

Her green eyes danced along the figures of the students and teachers that littered the quad, looking for her boy. Danny walked by then with Ethan, and pointed her in the direction of the corner. She frowned. There was a small corner where most of the staff went to smoke on their breaks, or even some of the students, but Stiles wasn't someone she had ever imagined going there.

She broke out into a slow jog as she rounded the corner, pulling to a stop when she saw him. He was sat on the steps, his backpack laying beside him with his elbows on his knees and his head bowed against his chest.

"Stiles! What are you doing back here?" Lydia asked, folding her arms over her body, and tugging the sleeves of her cardigan down around her hands as she looked around their surroundings with a grimace.

Stiles simply shrugged. Lydia sighed,"Are you okay?"

Another shrug.

"Stiles..."

She moved so she was standing in front of him, and bent down, gently reaching up and grabbing his hands. She pulled them down towards her, and wrapped her smaller hands around his, warming them up. His head rose to look at her and she gasped, freezing in place.

Black eyes stared back at her, though they were replaced by his warm, troubled honey eyes as quickly as they appeared. It was enough to frighten her, and she remained frozen in shock as he frowned.

"Lydia? Lydia, are you okay? When did you get here?"

Lydia snapped out of it, closing her mouth and opening it again, frowning and cocking her head to one side,"A few seconds ago. You don't remember?"

Stiles shook his head.

"It was literally around thirty seconds ago." Lydia narrowed her eyes,"Stiles, what's happening with you?"

Suddenly he was retreated. He tore his hands from hers and backed up, standing up quickly. Lydia almost stumbled and straightened up too, puzzled at his behavior.

"Nothing." He answered simply, turning away from her,"I'm fine. I'll see you at lunch, okay?"

Lydia watched him go and moved to go after him. She reached out and made a grab for her arm. Stiles turned back, roughly wrenching his arm from her grasp. They were there again, the black eyes and her hand rose to cover her mouth in shock. Her heart had all but stopped beating as he stood there glaring at her, a snarl in the place of the usually sweet smile he always fixed on her. This wasn't Stiles. Lydia felt the fear grip her entire body and took a step back, tears welling in her eyes. He took a step towards her, tilting his head, his eyes roaming her in a calculating motion.

"Lydia? Stiles?" Allison's voice rang through the quad as she jogged up to them, a smile on his face,"Hey! There you guys are!" She wrinkled up her nose as she glanced towards the smoking corner,"Why are you here?"

Lydia didn't reply, her eyes never leaving the tense form of the... whatever it was that was standing in front of her. As Allison planted herself beside them, Stiles's eyes returned to normal, the snarl gone and replaced by a confused look.

"Lydia?" He called softly,"Lydia, what's wrong?"

Lydia wanted to cry. It was like Jackson all over again, but this time, it was worse. She had always endured a sense of anger and rage from Jackson, but Stiles had always been nothing but gentle, like he was being now. A tear fell from her cheek and Stiles's eyes softened in such a way that made her think he was feeling his heart break. For her. Whilst she was standing there, her heart breaking for him. She didn't realize she was shaking until Stiles stepped forward, his hand reaching out for her. She jumped back.

Allison frowned,"Lydia? Sweetie, what is it?"

Lydia's wide green eyes went from Allison to Stiles, and she stared at him, her hands moving to press against her eyes as though it would rid her mind of the dark, evil eyes that was seared into the insides of her eyelids. She dropped her hands, breathing heavily and blinking the bright spots away. Stiles's eyes were still normal, and both he and Allison were watching her every move in concern.

"I..." Her voice cracked,"I don't feel well. I'm... I gotta go."

She could hear their voices calling after her as she ran away, hating herself for it. She could have just told them what she had seen, or at least Allison or Scott. No, instead she was running. Because she had been crazy once, she had been through the hallucinations more than once, and she wasn't going to rat Stiles out until she was absolutely sure that she wasn't the one in trouble.

She flew into her car, breaking some sort of limit she was sure as she pulled out and hit the two lane asphalt away from the school.

Her breath came out in harsh pants, her chest heaving with every breath she took as tears cascaded down her cheeks. She must have imagined it. Stiles would have never been so rough with her - not unless it wasn't her Stiles. Lydia angrily wiped the tears from her face, frustrated with trying to calm herself down. She didn't know which one was better; that there something was wrong with Stiles so that she wouldn't have to go through the pills and the doctors again, or that she was crazy, and the adorable, sweet and gentle boy was perfectly fine. Either way, her heart was breaking, and it was that broken heart that led her to the Beacon Hills Animal Clinic.

I know it's not very good, but it's late, and anyway, I apologize. Let me know what you think and whether I should continue. Even if I do continue, it won't be terribly long. A medium sized handful of chapters at least.

- Megan