I do not own My hero Academia

or the cover image

I do own the plot though

also I own my ocs.

Dark green waist length grass brushed against the six-year old's legs as she walked. Flowers covered the ground around her and the scent of them filled the air. The light green All Might onesie doing nothing to protect against the cold. Whimpering the teary-eyed girl clutched the stuffed rabbit she was holding tighter. Bruises from Katsuki's latest assault covered her small arms. Stumbling she fell down onto the dirt. Low growls reaching her ears. Spinning she shoved herself back as glowing golden eyes came into view. Her back hit a tree stopping her from running away. Whimpering she closed her eyes as the creature came closer. Feeling a hand touch her cheek she gasped her eyes snapping open.

Golden eyes stared back at her from a face that looked almost the same as hers. The two girls could have been twins if not for the silver hair that flowed down the other girls back and the fluffy wolf ears poking out of her hair.

"Cute," Izuku whispered reaching up to touch the other girl's ears. They were soft under her fingers. The pleased moan that filled the air surprised her though. Blinking she tilted her head to the side asking, "Who are you?"

"I'm your quirk," she said bluntly mirroring Izuku's confused head tilt. When she spoke Izuku caught sight of the pointed teeth in her mouth. Reaching out she poked the girl's cheek. Pouting the silver-haired girl swatted her hand away.

"But the doctor said I didn't have one," Izuku said softly. Hope echoed in her voice, if she had a quirk then maybe her dad would come back. The girl across from her rolled her eyes before tapping Izuku's nose.

"And you think he knows more than me," she snapped sounding irritated. Her golden eyes narrowed at the thought of the doctor.

"I guess not, what's your name," Izuku asked grinning at the other. Leaning forward she noticed the other girl look down her face turning red. Immediately realizing the issue Izuku asked, "are you waiting for me to name you?"

Nodding slowly the other girl looked suddenly vulnerable. Izuku tapped her chin as she stared at her quirk thoughtfully. Eyes widening in wonder as a name flashed through her mind she grabbed the other girls hands saying, "Frost! Your name can be Frost."

Eight years later Izuku still couldn't get over her quirks strangeness. Sitting in class behind Katsuki she listened to the teacher with only partial attention. She was so bored. The villain attack this morning hadn't been anything special but it was exciting to see Kamui Woods in action even if only for a moment. Even if that had led to Frost commenting that he reminded her of a tree and that they could use fire against him. As if burning the hero to death was the proper thing to do.

"Izu I'm bored," Frost whined the words echoing through her mind. Eyes flickering to Katsuki Izuku decided to tune out the teacher.

"Me too, what are we doing tonight," she sent back. The mental communication allowing her to hear Frosts groan.

"Sparring unless you want to let me take over tonight," she replied sounding almost excited for the opportunity. Izuku winced.

"Last time I did that I had to wipe my browser history," she said the annoyance in her voice plain for the other girl to hear.

"Come on Izu, please," Frost asked almost begging. She was so bored plus her instincts were driving her to play with her other half.

"Only if you promise to stay on age-appropriate sites," Izuku said trying to bargain. Walking up to find her browser history full of mature content wasn't something she wanted to see. Frost growled in annoyance the sound echoing through both their minds. Frowning her ears flattened against her head as she pouted.

"Your no fun. Oh and incoming," she said lightly. Izuku twitched feeling the desk beneath her hands explode. Wincing she rolled away from the blast her back hitting the wall behind her. Staring at Katsuki's still smoldering hands, she groaned internally.

"Deku, what the hell do you think you're doing applying to the hero course when your quirkless," he ranted. Izuku winced but not for the reason he thought. She hadn't told anyone about her quirk. After her father left, she never saw the point in trying to change peoples opinions on who she was. Instead, she decided to work toward becoming a hero. If they couldn't see that she had a quirk then she wouldn't spell it out for them.

It was kind of sad that she managed to fool everyone into thinking she was useless. Well everyone but him. Katsuki had noticed the change in her immediately. And eventually, he had a run in with Frost while she was in control. To say that their first meeting was explosive was an understatement. After that, she told him about her quirk and ever since he'd been pushing her to announce it to the world. But she wasn't willing to do that.

Not only did hiding it gives her an advantage, but she wanted to keep Frost safe. Her other half was the most important thing in the world to her. She wasn't going to risk her by announcing it to the world. Hearing his jaw clench she pressed her back against the wall. Her quirk didn't just allow the two to switch who was in control it also gave her superior senses.

"I have to try," she said softly. He growled sounding even more feral than Frost. He didn't understand why she wanted to hide behind a weak persona. Opening his mouth he was about to yell at her when the class behind him started laughing. Minor explosions went off in his hands as he turned and started shouting at them for interrupting.

Izuku sighed once his attention was pulled away from her. Standing she made her way to the singed desk as the teacher tried to regain order. Katsuki glanced over at her frowning. Her pale skin contrasted with the dark green and black hair that fell over her shoulders. But that wasn't what he was focusing on. Satisfied that he hadn't injured her he sat back down drawing all the attention in class to himself.

Laying her head down on her desk she waited for the day to pass. Frost had decided to take a nap so her other half wouldn't be very much help. Closing her eyes she followed her quirks lead. Two hours later Katsuki was shaking her shoulder to wake her up. His usual minions were waiting outside the school. Watching her wake up he wondered just what their relationship would be like if he'd never found out about her quirk.

"Bakugo is there a reason you tried to wake Izu up," Frost asked standing from the cramped desk. He followed her movements as she stretched. Yawning she turned her golden eyes to him letting him see who was in control at the moment. If the third person reference hadn't been a big enough hint.

"Popsicle," he said causing her eye to twitch. Narrowing her eyes she growled at him. The nickname wasn't something she liked at all.

"Careful wouldn't want to lose an eye," she snapped. He scoffed knowing that she wouldn't actually do anything. Smirking he looked into her eyes still finding it weird seeing golden eyes on Deku's face.

"Can I talk to De- um Izuku," he asked. Frost tilted her head before closing her eyes. When she opened them again he was looking into emerald green. He sighed saying, "I really wish you would just tell everyone about your quirk."

Izuku winced before beginning to gather her bag. Her hair fell over her face as she worked hiding the indecision she felt. She knew that next year she would be forced to tell the teachers at U.A. her quirk. But all her life people put her down because they didn't bother to see if the rumors were true. No one asked her if she had a quirk instead they just assumed she didn't. After being hurt so many times she didn't want anything to do with those people.

Her own father left because he didn't want a quirkless daughter. Zipping up her bag she tensed when he reached out grabbing her hand. Meeting his eyes she noticed the concern in them. He could rant and rave all he wanted but his eyes never lied. It was the only way she could read him. Forcing a smile that she was sure he knew was fake she used her other hand to push her hair away from her face.

"Just wait until we get to U.A. Kacchan," she pleaded. He nodded releasing her slowly but never taking his eyes from hers. Frost cooed at the concern he showed causing her face to heat up.

"He's adorable," Frost said and Izuku wanted to kill her. Sighing she tuned out her other half's cooing in favor of watching his concerned look turn into a smirk. He already knew how much of a menace Frost could be. Stepping away from her he started for the door. The only goodbye he gave her was a wave.

Picking up her bag, Izuku left the building. She had to head home get changed then head to the café for work. She wanted to save enough money to get herself another jacket. Frost had spent most of her money ordering her own jacket. Something that Izuku was still upset about. Listening to Frost hum in the back of her mind she rolled her eyes.

"You're annoying," Izuku snapped as the two walked down the street ten minutes later. The shadowed overhead pass was coming into sight meaning she was almost home. Hearing Frost laugh she sighed. The girl hadn't shut up about finding a mate, boyfriend. Izuku didn't really understand why her other half wanted that but she didn't care. Frost looked for strength while she looked for personality. None of the boys she knew had any sort of good personality. Plus they were all weak.

"Katsuki's not," Frost whispered her tone teasing. Izuku blanched. Throwing the other girl a mental glare she wanted to puke.

"He's like a brother," she shot back. While Frost laughed at her she blocked her out. Reaching the darkened area she sighed as the sun stopped beating down on her back. Stretching her arms above her head she wondered if her mom would be upset if she took a few extra hours at work today.

Hearing something behind her she stiffened her instincts roaring to life. Spinning she jumped to the side dodging the slime like hand that crashed onto the ground where she'd been standing. Landing she could hear Frost growling. The sludge-like blob was laughing as it threw it's arm forward again trying to catch her. Stumbling back she tripped.

Frost screamed her name as the slime closed in around her. Thrashing she struggled against the liquid holding her. Ignoring the words of the villain she felt like the air was being forced from her lungs. Vision darkening she heard Frost begging her to stay awake. She saw a flash of yellow before the world around her ceased to exist.

All Might tapped the girl's cheek, the guilt he felt over arriving so late wouldn't allow him to leave her laying on the ground. Izuku groaned her eyes opening slowly. Seeing the large man hovering over her she yelped pushing herself away from him quickly. Her heart pounded in her chest so quickly that it almost hurt.

"Are you alright," he asked softly. Izuku took a deep breath trying to bring herself under control. Finally recognizing him she gave a slow nod. Mentally reaching out she felt for Frost. She found her still raging. She looked up just in time to see him about to leave. But she had so much to ask him. She didn't want to just let him leave. Acting on instinct she reached out catching the leg of his pants as he took off.

All Might almost screamed when he looked down and found the girl clinging to his pants. Making for the nearest roof he choked blood coating his lips as he felt his time beginning to run out. Smelling the blood Izuku felt guilty for causing him issues.

"Sorry I just wanted to ask you a question," she said unable to meet his eyes. All Might sighed about to tell her to continue when he started coughing. Smoke rose off his body revealing his smaller skeleton-like form. Rushing forward she helped him sit down despite the shock running through her. Frost whimpered the smell of blood and pain coming off him like a wave. It hurt her nose. Izuku pushed away the instinctive urge to run away.

"Not your fault," he whispered pain running through his body as he passed his limit for the day. It was obvious from the frown on her face that she didn't believe him. Frost was silent for once. Izuku frowned.

She could smell the blood on him and she hated the scent. It clung to him like something dark and powerful. All Might startled at the way the girl's eyes flickered to gold for a second.

"What was the question," he asked softly despite the pain he was in. Izuku sighed.

"Is it possible to be a hero without using your quirk," she asked ignoring Frosts annoyed growl. Her other half knew why she was asking. The possibility that maybe they could keep their quirk a secret was enticing.

"I don't think so, being a hero is dangerous and using your quirks is part of the job," he said firmly. Izuku frowned. She'd know it but still after years of keeping Frost a secret having to share her with anyone was strange. Looking away from him she sighed her hands clenching as Frost cooed in her mind.

"At least now I get to come out to play more," Frost stated looking forward to being in the open more.

"But you'll be in more danger," Izuku said softly it hurt to know she would have to put her friend in danger. Frost had been the only friend she had until Katsuki figured out the truth.

"Izu I know you're trying to keep me safe but hiding who you, we, are isn't going to last," Frost said knowing that they would have to fight at U.A. and that holding back would be an insult to both them and their opponent.

"You're my best friend, I just don't want to put you in danger," Izuku argued.

"I'm your offense Izu," Frost stated leaving no room for arguing. They were two sides of the same coin. Frost was the offense and Izuku was the defense. Yet they were both better together.

Watching the silent conversation All Might wondered just what was going on in that head of hers. The silent girl seemed to be waring with herself. Finally, she nodded slightly agreeing with Frost's words. If she wanted to be a hero then she couldn't hold back.

"Will you be okay," she asked softly. The older man nodded pushing himself up. Izuku watched him go with a sigh. Why couldn't things just be easy? Gripping the strap of her book bag she turned away from the rooftop deciding to head home. There wasn't anything else she could do at the moment. Hearing an explosion she glanced back. Part of her wanted to go see what was happening but did it really even matter anymore.

The connection she had with Katsuki went wild. Fear filling the bond. Pushing herself forward she clung to the railing for a moment. Her instincts going wild as Frost took control instantly. Her pack was in danger. Narrowing her golden eyes the girl spun around. The bond between her and her packmate leading her down the stairs and through the streets.

In the back of her mind, she realized that they were heading in the direction of the villain attack. Clenching her teeth she held back a growl. Skidding to a stop just behind the crowd she froze. Fear belonging to both of them filling her veins when she realized just who was holding him captive.

Green slime encircled his body holding him in place despite the explosions he was sending at it. Frost could hear Izuku whimper inside her head and it brought her back to reality. Staying still wasn't going to help him. The fact none of the pros were doing anything caused her to growl. The animalistic sound causing some of the fellow watchers to flinch away from her.

Fear showed in Katsuki's red eyes as he glanced in her direction. It was too much. Heart pounding in her chest she moved without thinking. Bolting through the crowd the girl ignored the heroes calls for her to come back. Throwing her bag in its face she reached for Katsuki. The boy's fear-filled eyes met hers.

Grabbing his hand her eyes flickered between green and gold as the two halves of her both screamed out for him. Seeing his eyes roll back in his head she clawed at the slime with her other hand. Hearing the villain say something she ignored him not caring if she got hurt. Feeling a hand clamp down on both her and Katsuki's hand's through the slime she felt her eyes widen. She barely saw All Might before the force of his punch caused her to lose consciousness.

Bakugo groaned opening his eyes slowly. At first, he was confused. Glancing around he sat up on the pavement. Rain pounding down on top of him. Tightening his grip on the hand held in his he followed it to the girl laying beside him. Memories ran through his mind.

"Deku you idiot," he snarled almost crushing her hand in his. Hearing her groan he bit his lip. Izuku's green eyes fluttered open letting him know which one was currently in control. Looking up at him she had less than a second before he was holding her up by her shoulders and shaking her saying, "Stupid fucking Deku did you even think? You could have been killed you, idiot!"

"Sorry," she whispered. Scoffing at the weak apology he let her go as the pros began to walk over. Shrinking under their attention she looked down. Noticing her discomfort he released her shoulders and took the hero's attention.

Gathering her stuff she snuck away while they were focused on him. They didn't even notice. Frowning she crossed her arms. Frost was growling lowly in her mind.

"We were weak Izu," Frost said darkly. Now that she had a moment to think her pride stung. Izuku sighed knowing what her other half meant.

"It's to be expected, our quirk doesn't really work against things like that," she said trying to calm down her other half. The growling stopped as Frost thought over her words. She could admit their quirk wasn't equipped for taking on slimes.

"Still we could have died, Bakugo was right, charging in was stupid," she said but there was no regret in her voice. If anything she sounded more amused. Izuku's lips twitched into a small smile. Walking home she thought about what she was going to tell her mom. It was a given that the woman would find out about her stunt. Paling at the thought she sped up slightly. Taking the back alleys home she scented the air.

A familiar scent caught her attention as All Might stepped into her path. Looking at the man she heard Frost whine in her head. Funny how quickly her more primal side had grown attached to the man. Seeing him cough again the scent of blood grew stronger. Eyes flashing gold she frowned at him.

"You smell like blood," she said bluntly. Wincing at her tone he met her eyes.

"Yes well, that tends to happen when your missing half your stomach," he said without humor. Frost flinched her eyes widening. In her head, she felt Izuku cry out in shock. Keeping her silence she circled around him. Letting her study him he did the same. The eye thing told him she had a duality type quirk and her comment about his scent told him she had enhanced senses. Clearing his throat he asked, "do you want to be a hero?"

Frost stilled. Staring up at him she could see the strength in his eyes despite his physical condition. Nodding slowly she watched him without fear.

"I can make you a hero," he offered. Crossing her arms she tilted her head to the side curiosity in her eyes.

"Why," she asked confused and curious about his offer. No one believed she could be a hero except Bakugo. Even her mother doubted her.

"You charged into that fight without hesitation to help your friend, that is exactly what being a hero is about," he told her. Eyes changing to green she grinned at him.

"I accept your offer. My name's Izuku Midoriya," she said extending her hand as her eyes changed back to gold. Smirking she said, "And I'm Frost."

"Toshinori Yagi," he said shaking her hand.

Yay my first Fanfic outside of the RWBY category. This was supossed to be out on the seventh but got delayed by poor internet connection. What do you guys think?