I am Fire

Izuku quirk voice

All Might's voice

Staring at ones idol growing up in person could do many things to a person, they would either go from serious to a gushing fangirl/boy in seconds, or approach said idol to shake their hands in utual respect, Izuku… well.

He chose to be an oddity.

Blushing deeply at being bare chested in front of his idol, he did the only thing that made him comfortable without a shirt.

He ignited his Quirk while covering his upper body with his arms.

"ALL MIGHT! *Cough*. All Might sir, I knocked the slime guy out for you" gesturing to the now human thief lying on the ground, Toshinori Yagi blinked at the sight before turning to the green flamed teen beside the thief before he smiled his All might Smile.

"THANK YOU, also sorry if he had caused you any trouble, it took me a bit of effort to get through the sewers" looking to the Sewer grate after it landed beside All might, the two stared at the object before turning to the villain who gave a groan.

Looking to one another they shrugged.

"It's no trouble, If I get asked why I'm using my quirk I can just say self defense" approaching the Villain who was slowly gaining a second wind, the man looked up to Izuku who stomped on the man's head light enough to render him further unconscious, hefting the man onto his shoulders, Izuku turned to see All might smiling slightly.

"He's all yours" holding the man to the Hero, All might gave a nod of thanks.

Watching the hero move to leap away, Izuku perked up as a question forme din his head while looking to his glowing hands.

"All Might?" looking up to the Hero as he stopped and turned to him.

"Yes?"

"Would someone with a Quirk like mine be able to be a hero, despite not knowing their limitations?" looking to his hands as their glow dimmed into skin coloured hands, Izuku had a sad frown on his face that All might took full notice to.

"What do you mean my boy?" looking up to All Might with a frown, Izuku spoke with a sigh.

"Whenever I go to test myself, I always feel like I'm breathing two lungs at once, except these lungs feel larger, larger than even me, I feel my strength shift with each movement I make" clenching his fists to test the strength he felt, All Might took full notice to what could be his heart in his chest glowing beneath the skin.

Staring at the boy with a trip down his memories, Toshinori frowned at the boys fear of hurting others, it was when he saw himself in Izuku's place did he speak.

"I may not know what you mean at the moment but, I know a place where you could see how your quirk works without harming anyone" watching All Might reach into his pocket, he gave Izuku a card with an address on the middle.

"And to answer your question, it doesn't take much to be called a hero in todays era, but it doesn't mean that you should doubt yourself when trying"

Turning to leap away with the thief in hand, All Might turned to izuku who stared at him from the card.

"All it takes is a Leap of Fa*Guuurgle*" waving away the smoke that suddenly enveloped All might, Izuku blinked at the sight of a near death looking man with very sharp features and long limbs, dropping the thief to catch his own weight, All might swore at the poor timing before turning to Izuku who stared at him in a deadpanned look.

Raising a hand to point at Toshinori, he spoke.

"I take it this works like my quirk?" seeing Toshinori blink he spoke with a waterfall of blood leaking from his mouth that resulted in a coughing fit.

"Yeah*Cough* though I never really looked like this until five years back" frowning at the man as he sat down beside the unconscious thief, Izuku stood as All Might/Toshinori Yagi, told his tale of pain and woe.

"This is a wound I got five years ago by the attack of a Villain" frowning in thought at seeing the scar, Toshinori continued as Izuku looked to his left hand as it ignited into green flames.

"Result. Semi-destruction of my respiratory system and total removal of my stomach" lowering his shirt to stare out to the city, he continued on, failing to see or even feel Izuku raise his shirt with the green flame.

"My face is emaciated and haggard; my eyes are side effects of multiple surgeries-WHAT THE HELL ARE YOU DOING!?" jumping as Izuku shoved his green flamed hand onto his wound, Toshinori gave a cough of blood before he felt his breathing clear up, and for the first time in five years he felt way too hungry.

Looking down to Izuku's hand on his wound, his eyes widened as the scars of his surgery slowly but surely vanished with a green glow, watching his wounds vanish Izuku went to remove his hand before he yelped as a small, gold orb shot into his hand, making him shake his hand at the odd sensation while Toshinori stared at izuku before he smiled.

'So, you chose yourself it seems' moving to get up with no pain in his body at all, Toshinori looked at his hands before flexing, his muscled form replacing his weak form with no issue at all.

Making a gasp escape form his lips, he turned to Izuku who gave a smile before he noticed a disgusting piece of flesh squirming on his left hand before he threw it to the ground.

Getting a pain filled screech from the thing Izuku wasted no time setting it ablaze with green fire.

Watching the sight of Izuku burning the thing that was once inside him, Toshinori suddenly had a worried thought at what Izuku had said before.

About how he didn't know the full extent of his Quirk.

Placing a hand on the boys shoulder, Izuku looked up to All might who had a smile full of nothing but hope and joy.

"My boy, Do you know what that jolt you felt upon healing me was?" seeing Izuku give him a stunned and confused stare, he was about to answer until All Might spoke.

"You my boy, have just become my successor" staring at his Idol with wide eyes of awe and confusion, Izuku blinked several times before his mind gave him his answer.

"Say what now?"

"My boy, come with me, we're going to get to the bottom of your Quirk and see just how much heat you can bring to a battlefield!"

One week later

Now standing in a Military bases Quirk proof hanger deep underground, Izuku stared forward with a stunned amazement in his gaze, the base known as Kuse-chi, was set a mile out of the city, a testing ground built for U.A. students who are recommended, and seeing as Izuku, after an explanation from Toshinori after he had fully introduced himself, stood in the Hanger while a now healthier looking All Might stood in an examination room with a man in General clothing beside the underground hero known as Erasurehead.

The voice of Toshinori spoke through the intercom, startling Izuku by the suddenness.

"It is alright Midoriya, we're simply testing the output of Your quirk, you may think you cannot control this fire, but in truth you are it's master"

"In other words, go all out, I'll be sure to shut off your quirk if need be" giving a nod to Erasurehead, Izuku shook his legs with his hands.

Inhaling deeply as he willed his fire to erupt over him.

Breathing deeply as his flames grew his heart slowly began to become witnessed as his shirt burnt away, leaving his pants somehow untouched by the flames.

Seeing this, the General looked to the temperature in the room as it grew in heat.

"Hmm, seems he can raise the temperature, it's at one hundred degrees in there… and Climbing!" turning to the General as he gawked at the temp guage, Toshinori frowned at thinking of Endeavor, until he noticed the heat increase.

"Uh, Yagi, where exactly did you find this kid?"

"In Musutafu, Why?"

"Well, from what I'm reading… He's bringing a volcano towards us" turning to Erasurehead with wide eyes, the General went to call for Izuku to stop, only for the hanger to explode with an inferno not even Indeavor could summon with Izuku roaring in the centre.

Melting the supposedly fireproof steel beams.

"Evacuate the Base, now!"

*BOOOOM!*