Disclaimer: Of course I don't own My Hero Academia, its characters, or the franchise.
Story: Izuku was a fervent fangirl who wanted to be a hero. But despite her weird mutated genetics and a self-serving Quirk, she was determined to be like All Might! She just didn't know that, in history, Soulmates was a phenomena that preceded Quirks…But why'd she have to get three of them in this day and age?!
Set as an AU genderbending fic.
Spoilers: Most definitely for all seasons, even if this is an alternate take.
Warnings: Age disparity, cursing and violence for now…hm, just in case since I'm usually writing it, bit of crazy humor, perverted humor, morbid or sarcastic humor, and maybe some sexual situations…
Pairings: Fem!Izuku/All For One, Fem!Izuku/All Might, Fem!Izuku/Endeavor, side-Dekubowl (because my regulars know my habitual obsession with the protag/one-sided (or not) others XD), maybe later one Asui/Ochaco, etc…

Advent of a Heroine
Chapter One: Anomaly

She held on tight to her daughter, unable to stop crying.

This wasn't how it was supposed to be.

Of all the things Midoriya Inko had expected to hear that day, her daughter being diagnosed as Quirkless was the last thing she expected. But that was what the doctor had told them and now the two of them sat in front of the computer, crying together even as the video of All Might played in the background and Izuku forced a smile through her tears.

When Izuku finally fell asleep, she carried her daughter to her bed and tucked her in. Then she went to the phone and called a number, hoping he was awake and would answer.

"Hello?" She almost started crying in relief at the sound of his voice.

"Hisashi? There's something we found out today…"

And that's why the next morning found Inko sending her only child off on a plane to America so she could spend some time with her father.

When Hisashi heard the news, he didn't know what to think. He still loved his daughter of course. Nothing would change that. But she was Quirkless and he knew how hard that was on her, never mind how hard it was going to be for her in the future. Right now, Izuku was upset at the news, but as she grew older, there was certain to be bias against her and she would have a hard time against the world that didn't think much of those who didn't have a Quirk.

"Otou-san~" Izuku sing-songed, happy for a little while in her distraction. For a moment, he could be glad that his daughter's favorite hero, All Might, held to a positive outlook on life that Izuku strove to emulate, even if he personally was indifferent to heroes himself. "Can we get ice cream?"

He sighed. "Alright. There's an ice cream parlor around here."

"Yay!"

She grabbed onto his hand and skipped forward, nearly leading the way despite not knowing where she was going. New York was a large place though, so he kept a tight hold on her hand.

"Over here, Izuku," he said and he went forward and showed her where to go.

Briefly, as they entered the ice cream parlor, he thought about moving Izuku there and having her live with him. He missed her and he never got to see or hear her often because of his work abroad. It would be nice to have Inko there as well, but he knew that her work with Bakugo Masaru in the fashion industry was important to her.

It would be better for Izuku. America was a bit more tolerant of Quirkless people than most of the world and she could live a better and more comfortable life. Her English was also pretty good already, despite her being only four, and she was incredibly smart. Here, without a Quirk, that aspect of hers would still be very appreciated and thought of as more than useful.

She poked him in the side. "Otou-san, what are you getting?" she whispered.

He smiled slightly. "Strawberry."

While she chattered about what flavors she wanted to try, he continued to think about Izuku's options. As they accepted their ice cream and he paid for it, Izuku took his hand again and led him out of the ice cream parlor. He wondered when and how to broach the topic with her, but as he watched his daughter messily eat her ice cream, he was inflicted with a sense of longing. Why did Izuku want to stay in Japan? There really wasn't anything there for her. He'd already heard from Inko about how she was starting to get bullied, and it would get worse from here on out when it was found out that she was Quirkless. Maybe he could ease her into it —

"OTOU-SAN!" he heard Izuku scream and he looked at her in alarm.

"What is it, Izuku?"

"Look, look! All Might is here too!" she pointed out a store that had an All Might display.

He sweatdropped. "That's…nice…"

"Can we go there?" she asked, widening her eyes.

Hisashi cringed, but then his daughter's lower lip started trembling and he sighed. "Alright."

"Yay!" she pumped a tiny fist into the air. "Let's go, Otou-san!"

"You're such a fangirl," he teased her, enjoying his time with his daughter.

"Ehhh? Don't unesmate a fangirl, Otou-san!"

"I think the word you're looking for is 'underestimate.'"

She kicked her feet. Back and forth. Back and forth. She tilted a bit to see if she could touch the floor, but she leaned too much —

"Izuku," her father reprimanded sharply and she sat up straight, stilling herself. She couldn't help kicking her feet just the tiniest bit though.

"Sorry, Otou-san," she pouted, wiggling her feet inside of her shoes. "Are we going to be done soon?"

Her father, tall and handsome in his lab coat, pushed aside some papers before he looked at her. He sighed but gave her a smile.

"Soon, Izuku, soon. Just be patient for a little longer?"

She lightened up on her pout but scrambled for her hot chocolate on his desk, holding it up to her father.

"Otou-san, please!"

He chuckled, the sound of it warming over her. He reached for her cup and took a deep breath, before exhaling slowly. Just a tiny burst of fire escaped from his mouth to hit her drink, and he handed it back to her.

"Careful," he told her.

She nodded and held it, but it accidentally slipped from her fingers and crashed to the floor. Some of it splashed onto her legs, causing her to shriek in pain.

"Izuku!" her father stood up and quickly went over to her, scooping her up and quickly bringing her near to a nearby sink, soothing her burned legs with cold water. He tsked. "I told you to be careful," he lightly chastised.

Izuku just started bawling, crying large sobs as she rubbed at her eyes. "It hurts!"

He snatched up wads of paper towel and soaked them with cold water, and brought them along as he carried her back to his desk, settling her on it. He held the wet towels to her legs and told her to hold it.

"I'm going to find the first aid kit," he sighed.

"I want my hot chocolate," she sniffed and looked at the mess on the floor.

He looked at it too. "There aren't any more. I'll have to get you more tomorrow, Izuku."

She shook her head rapidly. "No!"

Izuku stared really hard at that spot and blinked away her tears. To both of their amazements, a shield of light surrounded the mess and it was like time rewound in that small space, the liquid flying back just as the cup reassembled. At the same time, she touched her legs as she leaned forward to watch the phenomena, and two matching shields of light formed over her legs, seemingly healing them.

"I-is that my Quirk?!" Izuku squealed, clapping her hands excitedly. "Otou-san, Otou-san! I have a Quirk!"

Her father stared at the spot intently, glancing at her legs, and she wondered what he was thinking and why he wasn't celebrating with her. But then she forgot about it as she scrambled off of his desk and went back to her drink, carefully picking it up. It was still hot!

Happily but cautiously taking a sip, Izuku resettled herself in her previous seat and focused on her drink.

"Izuku," he said calmly. "Would you want to move here to America and live with me?"

She blinked up at him, holding tightly to her drink. She scrunched up her nose. "But I have to go to school back home and Okaa-san will miss me. Plus, I got a Quirk now and I have to tell Kacchan!"

He nodded absentmindedly. "At least think about it, okay Izuku?"

"Mmkay, Papa," she said in English and she saw him smile at her.

"Izuku, tomorrow I'll take you out to wherever you want to in the city. But tonight…Papa's going to do some tests on you, alright?"

She made a face, but nodded. If her dad wanted to do some tests on her, he probably had a reason.

That night, Hisashi drew some blood from his daughter. He examined it while Izuku played on his computer, seeing what had been diagnosed before. His daughter was Quirkless. So what was that earlier? What had happened?

He tapped his fingers repeatedly on the table as he examined the results, trying to think about what might have happened —

His fingers stopped and he froze. Glancing at his daughter, he frowned and remembered to a time when she hadn't been born and he had done something to himself when he was just a bit younger…

Quirks were a mutation in the evolution of humans; the next step in their genetic makeup. What's to say that what had happened to Izuku was not something of the Quirk nature, but of another biological evolution; a different type of mutation similar, parallel to Quirks?

Before Izuku was born, he'd gotten his hands on an interesting biological sample that contained a Quirk nobody thought was real. And he'd, in a fit of madness he was sure, had injected it into himself to see if he could bind his DNA with it, and be capable of wielding that Quirk. While nothing bad had thankfully happened, he hadn't gotten the results he hoped to achieve either. Nothing had virtually happened.

However, if the exchange had indeed created the resulting evolutionary mutation in his daughter…

"Izuku," he called out. His daughter looked at him quizzically. "Would you mind staying a whole week with Papa?"

Her green eyes brightened up. "R-really? Of course!"

Started 8/1/18 — Completed 8/3/18

A/n: An okay length, but still shorter than what I'm used to. Ah, I was expecting to get my fem!Edward Elric up first before starting anything else, but I started watching and binging My Hero Academia and then I was a lost cause. Seriously, there was a reason I kept putting off starting this anime…Oh well XD Please enjoy and remember to review!

Quick Points:

1. The whole mutated time thingymajob? It started because I wanted to think up some kind of Quirk for Izuku and I had a few scenes in mind with time, and then I was thinking of doing something like Whis' time ability from Dragon Ball Super. Maybe a little bit of Hit in there. Then all of a sudden –(tapes mouth). Now that's a spoiler ;P

2. Pairings: I will say this now, to my newer and non-regular readers, I don't like being hassled about my pairings. Don't like, don't read. Simple. Stating this now because it's a new fandom I'm not sure of, but I am hopeful will be respectful. I don't usually have a problem with this, except maybe for one or two fandoms that are oddly hostile to non-canon pairings, but ehhh. Like I said, don't usually have a problem and otherwise don't give any fucks. Otherwise, please give them a try and enjoy the ride!