Izuku Midoriya couldn't believe his eyes. All Might's identity as a frail man was being saved by a tiny woman with a messy bun and yoga pants talking in English. Luckily for him, he'd spent enough time paying attention in Present Mic's class to understand what she was saying, although it was hard to hear her over the blasting stereo strapped to her hip.
"Seriously, Toshi?" she was saying, straining herself against some unknown force to stay still while a somber, haunting chanting was coming from her stereo. The villains were also straining against some unseen force but being forced to be still. "What in the hell makes you think you could take these villains on? You are SO lucky i was called in to do psychological profiling and it couldn't be done over VIDEO CHAT!"
All Might for his part looked extremely relieved that the shrill woman was there and seemed to be puffing back up. Izuku got a good look at the woman who was berating the number one hero while simultaneously restraining the league of villains with some unknown force.
She was short, possibly 5'3-5'5" with brown hair whose length was an undetermineable length, but was at least long enough to pull into a messy bun with multiple straight strands hanging down around her face and on the nape of her neck. She was extremely pale, enough so that Izuku wondered if her pallid complexion was part of her Quirk. Her legs were very muscular wrapped in her black yoga pants but the rest of her figure was obscured by the baggy gray tee and black sportsman jacket she was wearing which was very different than the tight spandex outfits he was used to female heroes wearing. Her voice was possibly the shrillest voice he'd ever heard, and if he'd been unkind, he would've called it-
" christ, you ANNOYING damn hag, if you get any shriller, you could just bust their damn eardrums and we'd be outta this mess!" Katsuki Bakugo's voice screeched out straining against the same unseen force to cover his ears. She glared at him with hooded green eyes behind some pink wired rimmed glasses.
"You know, I'm literally only here to save all might and get the injured heroes to safety, i could just leave YOU here" she grumbled as emts flooded the scene strapping Best Jeanist to a stretcher " as long as they keep their earplugs in, my quirk wont effect them since they cant hear the music"
"Good to know, lady" came a sinister voice from behind her and she turned her head just enough to see Dabi coming for her, flames erupting from his hands. His ears were bleeding which suggested that he had a concussion affecting the way he was hearing. Just as he got to her she managed to press a button on her music device and the music changed, causing everyone to visibly relax as an upbeat hip hop music blared around them.
"Oh, so pretty boy wants to dance," she cackled, with everyone including Izuku, Tenya, Kiri, Shouto and Momo copying the woman's stance automatically " well then, if your mama taught you any manners, you'd know its rude to keep a lady waiting."
Izuku noticed a palatable drawl in her voice now that it was not screaming and a tingle of familiarity zinged through his brain. Where had he seen this woman before? Unconsciously his brain produced the image of a younger woman with short choppy hair with blonde streaks, lots of black eyeliner and green shimmery eye shadow, and wearing short jean shorts with a pink silk blazer embroidered with a name on the back with sparkly purple thread that read:
"BOOM BOOM!" gasped Izuku unconsciously gaining looks from everyone in the arena giving away their positions. Dabi's grin widened significantly seeing them, and the woman, now identified as Boom Boom glared even harder, making the worry lines in her forehead furrow even more.
"So, All Might's little sidekick from America shows up out of the blue?" he muttered just loud enough for her to hear "Your quirk is powerful for sure, but if i recall correctly, didn't All Might let you get crushed by a building and you broke your neck. It never did heal right did it?"
That was when Izuku saw it, the way she held her body. It looked like someone in extreme pain trying to fight it and the scar on her neck standing out starkly against her pallid skin. Boom Boom held her stance but reached down and turned the volume down on her boom box so that Izuku and his rescue party couldn't hear it but everyone in her immediate vicinity still could.
"Alright listen to me, kids, when i make a move, stuff your ears with whatever you can, grab the Bakugo kid and run. Do not hesitate, and do not try to listen to the music. If your brain registers to music at all you'll be under my quirks power. Go find the heroes or the police and tell them what's happening. There's critical injuries about, and now civilians in this firefight. Do I make myself clear?" her voice was low, and authoritative in perfect Japanese but Bakugo bristled at the thought of being 'rescued'.
"Listen here you old hag-!"
"DO I MAKE MYSELF CLEAR?!" she shrieked at the teenagers which shut Bakugo up and made the teenagers jump out of their stupor.
"Yes ma'am!" they cried and began stuffing their ears with pieces of their clothes.
"Iida," said Shouto , " you need to run in and get Bakugo. You're fastest. We'll make sure you have a clear path."
"Roger" Tenya replied as he began gearing up, waiting for the signal.
"HAHAHA" laughed Dabi maniacally " listen here, you old bitch, I will not only prevent the rescue but i will ensure that your pathetic old body is broken beyond repair this time!"
"Come and get me then" she growled and Dabi lunged for her.
The minute she dodged under Dabi's arm, Iida rocketed forward to grab Bakugo while the rest of the squad slammed themselves into the heroes who were like rag dolls being thrown about, copying Boom Boom's moves. Izuku purposely rams against all might throwing him down.
"How long can Boom Boom keep this up?" he asked all might. The number one hero looked immensely uncomfortable as he glanced at the woman fighting the fire villain, her moves choppy and very clearly barely dodging the younger man.
"Not long, young Midoriya," he grunts, his body copying her ungraceful movements "The plan she gave you is the best option. Get help. I doubt that the Hero council thought she'd need to fight given how strong her quirk is and the fact that they relied on no one to recognize who she is"
Izuku's heart sank as he realized he had given away one of the major advantages Boom Boom had in this fight. She looked different enough that no one would guess who she was or how injured and unready for a fight she was.
"Go!" All Might encouraged and Izuku sprang away from him and began running. The rescue squad ran and ran and didnt stop until they were caught around the collar by a pale hand attached to a pair of glowing red eyes.
"Aizawa-sensei!" Izuku bursts out "Boom Boom cant hold out much longer. Dabi can't hear correctly so her quirk isn't working on him. She physically cant hold out!
Aizawa's eyes grow wide as he talks and he glares at the officials around him.
"Boom Boom?" he growled "That was your idea of back up? A retired hero with a broken body that hasnt seem a battle in years? Against the most powerful villains in the country?"
"Eraserhead, with her quirk, she should have been able to calm down the issue and more people would just endanger her mission-"
"Yeah, and now civilians and the heroes as well as Boom Boom herself are in danger!" Aizawa exploded, his hair floating and eyes blazing.
"Please, you have to save her!" Momo begged, her eyes blurred with tears "she sacrificed herself to save us and Bakugo!"
"We're here. We'll save her" says a voice to the right of recognizes the woman who spoke as the #5 hero Mirko the rabbit hero. With her is the number 3 hero Hawks.
"Make sure you distract Dabi," says the president of the Hero Council "Boom Boom must stay in the vicinity to allow emts and police to arrest All for One and to remove the injured heroes-"
"SHE COULD DIE!" Aizawa roars "SHE IS RETIRED"
"She's a hero" says the president brutally "she knows what's at stake. Unlike most,shes always known that this was a possibility"
Izuku's heart plummeted. He realized that if it came down to it, he had signed Boom Boom's death warrant.
AN: Boom Boom is an O/c of my creation and this story will follow her and her journey. Ive always wondered about All Might's life in America and she will be a critical link to it. In the next few chapters, we will discover who she really is and what she wants.