Disclaimer: Do you really think I would be writing fanfiction if I owned this manga? All characters and events in Boku no Hero Academia belong to Horikoshi Kouhei.

Warning: Bad language and bloody imagery ahead.

- Prologue -

Afterlife

Reincarnation had been the very last thing on her mind, especially when everything around her was crumbling down in flames.

During her final moments, she could have waxed some poetic bullshit about the meaning of life and the inevitability of death. Give herself a nice speech for all the things she had accomplished so far, list off all the people who loved and needed her, maybe resign herself to her demise with a cynical scoff without much fuss until the p(ain oh my fucking god it buRNS) eventually stopped.

But come on, who was she kidding? Only heroes get that kind of ending.

She was a pathetic fucking nobody until the very end.

The burning hellscape around her and the crushing weight piercing through her right side made her sick to her sto(mach oh god ohgod my stomach my lungs ican'tbreatheithurtsitHURTS-). She could still feel the tremors shaking the building and the distant screams ringing in her ears made a whole new kind of panic flare inside her chest. They were all running away, running away and leaving her to die- (no please come back please please it hurts so much-) and she could barely breathe let alone scream for help.

With each painstaking breath she took, a torturous stabbing sensation in her gut would keep her from gasping for more air. She could feel, smell, taste the blood filling into her lungs and suffocating her from the inside. Everything below her abdomen felt completely numb and she couldn't bring herself to look because she knew all too well (the debris crushing her legs, the iron rod impaled through her stomach, her intestines spilling out from-) that the view would not be pleasant.

The static noise clouding her mind (thick warm liquid dribbled out of her ruptured eardrums, she strained to hear the far away voices, pleasehelpme-) started to intensify, the splitting headache pounding away at her brain only further provoking the hysteria bubbling up within her. She could feel the tears soaking her face, dripping all the way on the cold floor she helplessly laid on.

(I don't want to die like this.)

What was the point of hoping for a rescue when she knew that none would come? She knew that heroes existed out there and that people like her were the ones they saved. But there was only so much they could do; she was being crushed alive. Even if firefighters and police were able to get her out, there was no future for her with a broken spine and damaged hearing. The first aid doctors would surely do their best to keep her alive, but at what cost?

She didn't have the energy to cry anymore, blinking away the dust from her eyes as she focused on the blood beneath her turning dry and sticky. It had been warm just minutes ago.

(What would a superhero have done?)

Heroes with superpowers: a dream she had foolishly clung onto even as an adult. The only heroes she had ever known came in the form of firefighters, police officers, army soldiers, doctors, nurses, any person who was willing to risk their life for another life.

Then again, she had always liked to think that the term "hero" was subjective to the context it was used in. An organ donor was a hero, so was a teacher protecting and supporting a bullied student. Suicide hotline workers, celebrities idolized by many, volunteers at refugee shelters: maybe she was just a hopeless romantic who liked to see the good in people. But imagining that such heroes still existed in the world continued to restore her faith in humanity, no matter how many atrocities she saw on the news.

To think that she'd just be part of another one of those atrocities was pathetic.

Her entire life, one failure after another: she was a hopeless embarrassment. She had ended up as a boring office worker, doing the same repetitive work day in and day out. Even with all the hard work she had invested into her studies, this was the best job she could get.

(Just once in my life, I wish I could have been useful.)

She had always been the one who received help, but had she ever been able to pay back the kindness of the people around her?

Here she was, in unbearable pain, bleeding out and dying. Without even a goodbye.

It hurt. It really did. In more ways than one.

(It feels like I've been dreaming for a long time.)

Airashi Megumi was born with a silver spoon in her mouth and spoiled rotten by family.

It was no wonder she turned out to be an utter brat.

When the time came to properly raise their child and discipline her the way parents should, she was instead handed over to a host of private tutors, housemaids and manservants... all of whom she was successful in terrorizing with her inflated ego and arrogant behaviour.

She would refuse to do any work, bringing her tutor to the verge of tears when something did not go her way, her words tearing into the poor woman with all the venom of a viper. Her snide comments to the housemaids often had them quitting their jobs in seething anger or bawling secretly in the washrooms.

And no one had the power nor the will to refuse her demands, for she was the precious eldest daughter of the Airashi household. No matter have intolerably annoying she got, they had no power to make her stop. She was as ruthless to her siblings as she was to any other servant, and it was no secret that even they preferred to avoid her.

Megumi was just absolutely horrid. A terrible menace. An insufferable bully.

But there was one person she always made sure to act cute around: and that was the second greatest hero Endeavour's son, Todoroki Shouto.

(Todoroki Shouto? But that's... I don't understand.)

As expected of wealthy people, they have their own circle of friends and acquaintances. Gatherings and banquets aren't uncommon and rather effective at establishing new connections benefical to all parties. It was precisely in one of such functions that Megumi had the pleasure of meeting the love of her life, and Shouto had the displeasure of encountering the bane of his existence.

She would cling to him, stick to him as if she were just another extension of his arm. She would talk his ear off with useless chitchat and pull him away if any girl their age interacted with him in any way. He hated it. He hated her. Every time he saw her, he wanted to shove her off. He didn't want her hands on him, didn't want to be anywhere near her. But his father had decreed that he was not to anger the prissy little princess no matter how annoying she got.

That's how years went by. Eventual conquest was the only thing occupying Megumi's mind- and she always got what she wanted. No matter the cost.

On her 14th Birthday, she announced to her parents that she wanted to attend UA High, the top Hero Academy in Japan. And of course, that's what she got.

(She had never been interested in heroes. She had never even thought about them, much less remembered any of their names. But where Shouto went, she followed.)

She was successful in passing the entrance exam- much to Shouto's displeasure.

(How can that be, I don't remember this-)

She had done it. She could finally attend the same class as her beloved Shouto, the infamous 1-A as the 4th recommended student of their grade that year. She did not remember much about her entrance exam partner, pointy teeth and a lizard suit on the forefront of her mind, but they would surely not be interacting much since the girl had been put into the clearly inferior 1-B.

None of her new classmates really knew how to get along with her. Arrogant, demanding and entitled: traits nobody would ever imagine nor expect a hero to have. Wherever Shouto went she would go. Her straightforward advances and his cold rejections became a common occurrence, an established dynamic within 1A.

Neither Tenya nor Momo could interfere with Megumi's affairs, for they had met her at gatherings with their parents before and had unfortunately gotten to know her difficult nature in close quarters. That of course did not mean that they didn't try- although it often resulted in a barrage of unpleasant verbal insults in addition to an upturnt nose.

(Who- Who is this girl, I don't remember her being in the-)

And then it happened. The turning point. The moment of truth.

Airashi Megumi was awful. Vindictive. Vain and fickle.

Why did she even exist?

(She doesn't belong, she's not a character here, someone like her was never in the series-)

Maybe she would never get to know.

(Why does she exist here?! Why am I seeing this-)

When she pushed away that stupid green haired nerd, it was as if her body had moved on its own. And just as soon as she shoved him away, the Nomu's blow made contact.

She heard the next thought echoing trough her head, Megumi's voice mixing with her own. Dry amusement drowned out the fear in her very soul as she made contact with the seafoam green of her eyes.

"Ironically, they appeared before us during our rescue training."

The Megumi in her dreams had always had a sneer or a frown on her face. But now, as she stood before her mirror image, that rueful smile and those sad green eyes made her feel like the dreams hadn't shown her everything about the cruel little girl.

"You must think I'm the absolute worst. I'm a mean bitch aren't I?" A scoff and a chuckle reverberating through the darkness. "It would be better if I never existed."

A cold hand pressed against her cheek. She looked up at Megumi. At those sad, but incredibly beautiful eyes. Her expression twisted into something terrifying. "I wish I was never born. I have nothing to live for."

Those same hands grabbed her by the throat, pushing her further into the darkness. She struggled, but Megumi's delicate arms were deceptively strong.

"But you do. You can do what I can't. I want to rest here... for eternity..."

Megumi let go. She felt herself falling backwards into the abyss. A soundless scream tore through her throat as she desperately clawed at the emptiness.

"Please live a good life in my stead."

And when she opened her eyes again, the feeling that something had gone extremely wrong hit her with all the force of a bulldozer.

White ceiling, white walls, the smell of disinfectant- she was in a hospital.

But by all means, she shouldn't have been alive.

The beeping of the heart monitor beside her went haywire when she pulled off the needles clinging to her wrists. Stumbling and tripping over her own feet, she grabbed a hold of the patient information sheet tucked into a folder on the foot of her bed.

PATIENT INFORMATION

LAST NAME; Airashi

FIRST NAME; Megumi

That was... not her name?

A quick glance at her reflection in the window revealed wavy, pale blonde hair and striking seafoam green eyes. She let the folder in her grasp fall on the ground, pinching her face and pulling at her hair hoping to wake up from this bad, very bad dream. This utter nightmare.

The door inched open, the young nurse snapping to attention at the sight of her awake.

"Oh my! It seems you woke up. There there Megumi-chan, no need for panic. I'll call the doctor for you real quick!"

Oh no. No no no. God. No.

What the actual fuck is going on.

A/N:

Hey! Thanks for reading this weird prompt of mine. I hope you enjoyed it.

I've read too many Isekai novels recently and this idea just popped up in my mind.

What would you do if you were reincarnated into a really spoiled character? And what really happened to them for their personality to turn so foul? These questions have plagued me a lot. At first I intended this OC to wake up in a canon character's body one day, but then my love of OC-Inserts interfered with everything so here you have this confusing mess.

I'm not completely sure if I will be continuing this story (because I tend to write in free-form without planning and fellow writers will know how that tends to turn out). But I really wanted to share this anyway, maybe to test the waters. I don't usually publish anything I write, since I'm hella bad at regular updates, so let's say this is a one-shot for now.

This was a great way to get over my writer's block and I don't regret anything!