This was a request on tumblr that has turned into so much more. Crossover into the world of Mortal Instruments. Fun stuff.

She heard a groan coming from an alley. It sounded like someone was hurt. With her phone clutched in her hand she moved to inspect what was happening.

She saw a tall boy, leaning over a hunched body, the body letting out little whimpers. She gasped and backed away, letting out a whimper of her own when the boy turned to her and she dropped her phone.

He looked at her curiously, like a serial killer as far as she was concerned, how could he smirk at her after what he had done.

"You can see me." His voice was deep. He was much taller than her, his biceps easily visible underneath his black leather jacket. She saw what looked like a glass sword sticking out from his back. She was going to die. She'd seen on Grey's Anatomy that if you humanized yourself to your killer they might let you go.

"I'm Madge Undersee and I'm fifteen. My birthday's next week and my best friend's named Peter, but I had a hard time pronouncing r's when I was four so I call him Peeta. I've never had a boyfriend before and I love to play the piano. Please don't kill me."

He looked her over, his eyes moving from her leather sandals up to her white sundress. She felt naked under his gaze. He looked like the kind of boy her mother warned her against. What would her mother say now? She'd probably welcome her dating those boys who smoked outside of the school's gates instead of this boy who killed in dark alleys.

He leaned in toward her, his hand on the side of her head, leaning against the side of the building. "Never had a boyfriend, eh?"

The way he was craning his neck, she could make out a tattoo on the right side of his neck. It looked like a tribal tattoo, swirling symbols. It didn't look like a normal tattoo to her. Its edges were raised like a burn.

"Gale, what are you doing?"

She turned to see a girl clad in all black, a similar tattoo edging its way out of her shirt.

"We've found ourselves a mundane with sight. Her name's Madge, her birthday's next week and she's never had a boyfriend before."

"Don't talk about me like I'm not here."

The boy whose name she discovered was Gale looked to her. He smirked and looked to the other girl.

"She saw me kill it."

"Not it, him," she said.

The girl removed Gale's hand from beside her head. "Let's go. There's no proof."

"What are you talking about?" She said turning toward the corner, only to find a lone rat scurry between the buildings.

"I'm going insane," she murmured.

"Haymitch might want to talk to her."

The girl looked her over, her mouth turning downward. "Just leave her alone, Gale."

He grabbed the girl's wrist. "She might be one of us."

"There have been mundanes with sight it's not unheard of."

"I'm not going anywhere with either of you," she said defiantly. I'm right here! She wanted to scream And I'm not going anywhere you guys want to take me.

He moved back toward her, his face leaning into hers. "I just killed that thing over there, you think I can't take you anywhere I want you to go? I could knock you out in a second."

"Gale!" The other girl screamed. "That's enough."

"Katniss I didn't say I would knock her head against the wall," his hand came up to her neck, "Pressure points, my friend."

I tried to shrug his hands off of me, but he just kept smiling. "I'm a lot stronger than you. Madge did you say? Just humor me and visit someone I know. No harm will come to you as long as I'm near you."

"Is that including you?"

He smiled, "No harm that you wouldn't enjoy yourself."

The girl he had referred to as Katniss rolled her eyes, turning her back on them. There was another glass sword coming from her jacket, along with a quiver and a bow. She turned to look at Gale. "I'm bound by law to protect you, so is she. I mean it. Nothing or no one will kill you as long as you are by my side."

He had honest eyes. Madge believed that eyes were the windows to the soul and his grey eyes were warm and inviting. They didn't look like the kind of eyes that would tell lies and at least she would be conscious if she went willingly.

She stared up at the broken down warehouse. "This is where you guys live?" Where would they shower? The thought of Gale in anything less than what he was wearing at the moment, which was layers and layers of leather and cotton, made her face grow hot.

Katniss seemed not to have noticed her blush, giving her a soft smile, saying, "Just focus."

She narrowed her eyes, watching in amazement as the abandoned building transformed before her. She gasped aloud, bringing her hand up to her mouth.

"C'mon," Gale said, a smirk on his lips, as he pulled her through the gates. She was extremely aware of his hand on her arm. It felt hot against her cool skin. The only person of the opposite sex who ever touched her was Peeta, and he was her best friend. They'd grown up together, she'd seen him cry from scraped knees and he'd seen her the moment she woke up, blonde curls in every direction, drool fresh on her pillow. She didn't even notice when Peeta's hands were on her anymore, but Gale's burned where they touched. His hand wrapped around her forearm pretty easily and she felt his rough fingertips against her smooth skin. Her eyes traced over the black tattoo in the shape on an eye on the back of his hand.

She watched in amazement as Katniss asked for permission to go into the building and the doors opened. A cat greeted them, Katniss immediately scowled at the orange tabby cat. "I hate you," she muttered. Gale grinned at the exchange.

"Hey Buttercup," he greeted and the cat threw himself at him, rubbing his body against his leg.

Madge immediately leaned down, an animal lover herself, and watched the cat stride over to her. He rubbed himself against her crouched form, and when Madge rubbed his chin he purred.

Gale's voice interrupted her. "Buttercup, lead us to Haymitch."

The cat led them through the hall toward an elevator. From the elevator the cat led them to a lounge area, equipped with a Steinway piano. Nothing could stop her from playing just one song on that piano. She'd actually dreamt of herself and that piano. She ran toward it, completely forgetting that there was a killer behind her and his friend.

She brushed her skirt underneath her as she sat, her fingers skimming over the keys.

"That costs more than you're worth, Sweetheart."

Madge jumped, blushing a deep red, her eyes scanning the room to find the voice's owner. She heard footsteps from right behind her, right at her blind spot.

"What is a mundane doing here, Gale, Katniss?" His eyes narrowed at the two youths.

"She has sight," Gale defended, pointing to the girl in question.

"I told him, Haymitch."

His upper lip curled at the girl. "You're my parabatai, you're supposed to be on my side."

"In battle, not when you're bringing pretty mundanes to the institute."

Madge averted her eyes at the conversation, forcing herself to ignore Katniss's words, they'd only plague her mind in the future.

Finally the man turned toward her, dropping his glass of what had looked like scotch on the ground.

"What the fuck, old man," Gale yelled, looking in distaste at the liquor on his boots.

He approached her, warily. "It's you, but it can't be you. You're dead."

Madge shuddered. "What are you talking about?" she said.

His eyes had looked dazed until she spoke. "That's not your voice. That's Margery's."

"How do you know my mom's name?"

His eyebrows furrowed before smoothing out. He turned toward the other two in the room, "She's not a mundane."

"Will someone tell me what a mundane is?" She finally yelled.

Haymitch raised his eyebrows at her, "so alike."

Gale stepped forward. "It's someone from the human world."

She backed away, moving from the piano bench to the furthest wall. "What are you then?"

He stepped forward, but Haymitch stopped him. He took her seat at the piano bench. "We're Shadowhunters. Nephilim." He looked her over. "I suspect you're only half, but Nephilim blood is dominant, so you're one of us."

"I don't believe you."

"So skeptical, exactly like Maysilee."

"She's dead."

Haymitch's eyes flickered toward hers. "I know that. I watched her die."

"You guys are monsters," Madge said, cowering even further, as if she could sink into the wall.

"We're warriors," Gale said. "And you're one of us."

"Gale," Haymitch warned.

"No!" He yelled. "How many of us die for them? For these ungrateful little humans and for what? They never know about us. No thank yous. Nothing."

"She's one of us," Katniss reminded.

"Yeah and she might as well not be."

"Gale!" Haymitch reprimanded.

"Go home Princess," he growled.

Madge ran as fast as she could from the building, clicking on the elevator, as if her constant clicks would make it appear faster.

She heard Haymitch and Katniss yell her name, but she needed to get out of there. She wanted to go home, snuggle into her bed and fall asleep, wake up in the morning, walk to school and eat the muffins Peeta baked. Like none of this happened.