My Hero Acadamia: Fem!Izuku was kidnapped a couple months after her quirk came in: Illusions. Aka Alice in Wonderland based quirks.
Whispers on the streets warned of crossing the Queen of Hearts; a villain thus named for her ability to summon organs from inside a person and her focus of using it on only the hearts of her victims. She had amassed a group of people with quirks that suited her idea of the world by making her perfect Wonderland.
White Rabbit with the ability to shift between a small rabbit and one the size of a kangaroo. He was the one to lure people into the Queens court.
Hatter with the ability to summon items from within a large top hat that sat upon his head. He was the supplier of all sorts of weapons and "toys" for the queen.
Tweedle dee and Dum: twins with the same quirk that made them expand to any size to fill a room. They were intimidation and escape blockades.
And young Cheshire: a young child with the ability to warp reality to whatever she wants. She was the key to wonderland, and to its demise.
Midnight had been working on this case with Present mic and Eraserhead for a week now. The files they had showed each member of Wonderland and known facts about them. The Queen was a regal looking woman with black hair with crimson streaks wearing a red and black gown like from 1800s royalty. The only noteworthy info was she hated to lose anything. Rabbit was a large bipedal white rabbit wearing a nice three piece suit minus the jacket. He favored targeting women who try to save the "poor bunny!" Hatter was a tall man with thick curly midnight blue hair wearing a mismatch of scarves with the tophat sat crookedly on his head. He had nothing noteworthy. The twins were a brother sister duo who were almost as round as they were tall in the one picture they had of them. They delighted in making people scream.
It was the file on Cheshire that was the thickest with three pictures on the first page. One of a six year old girl, one of a ten year old, and one of a fourteen year old. Each picture showed her with striped magenta and light purple hair, cat ears, and a similarly striped jumpsuit. There was a list of victims in her file, some crossed off in red but most unmarked with a small asterisk signifying they were alive under a different name. One such man, Kimmoko Teio previously Kakimota Daichi was across from them.
"Yeah, little kitty did something, made them believe I'd been run off toward the Queen herself, made them believe they killed me, all while getting me out of there. Told me to go to the police and get a new name." he had a sad smile on his face, "Said she'd keep 'em off me."
"Where did they grab you at?" Mic asked. It might give them a clue on where the hideout was.
"Around Hosu I think. That alley next to the Screaming Yak bar." He looked all three of them in the eyes one at a time as he spoke next. "If you're going to arrest them, just know she doesn't want to help them. She has no choice unless she wants to save as many as she can from them."
Midnight gave him an encouraging smile. "Don't you worry hon, We'll make sure she's tried fairly."
"One more thing," he spoke up before he left, "They forced something on her when she was younger to amplify her quirk permanently, 'swhy she's so good at illusions."
It had taken a week to find the place and another week to come up with a plan. They were going to use a hero as bait to draw out the villains, with a tracker, and then send in as many pros as were available to overwhelm them. Aizawa was chosen as bait since he was underground and thus they would least likely know about him.
It took five minutes before he was "caught" and three minutes after that for his tracker to stop tracking. That was the signal for phase two. All the heroes had a filtration mask as Midnight released her quirk, knocking out the Tweedle twins. She moved further into the alley as it turned into some kind of giant flower garden. She was shocked to not have found any other villains yet, and it made her wary.
Ahead behind a large leaf of a tulip on a grass swing sat 6 year old Cheshire, humming. Midnight readied her whip in case of an attack and moved forward a bit.
"We're alone here, I've kept them away."
She paused at the voice. It sounded older.
"Are you here to take us in?" She was too calm about that. It unsettled Midnight.
"I am sweetie."
Cheshire sighed a bit and put her hands up in a position to be cuffed. "Could you wait two minutes before using the quirk suppressant cuffs? I need to make sure the heroes get everyone first."
"You're really going for that antihero aesthetic, huh? Ooh, I just got a pleasurable chill from that.~" She shivered in delight for a moment. "So what's your name sweetie?"
Cheshire looked thoughtful for a moment. "Mido... Izu. I think. I haven't heard my name since I was four. Her Majesty named me Cheshire, but it's not my name."
Midnight looked at a floating clock that was chiming an alarm. "Alright, time to put these on you. Not too tight now, I might not be able to control myself then~" As soon as the cuffs were in place the garden disappeared to show a smaller alley filled with heroes and cuffed or unconscious villains. Cheshires looks changed to that of a fourteen year old, and her colorful hair changed to a deep green close to black. Bruises were visible on her face with one eye swollen almost shut and her left leg looking broken. From across the alley came a loud voice of the Queen.
"HOW DARE YOU! CHANGE BACK! NOW CHESHIRE!" She was hauled off to a waiting police vehicle, screaming the whole time. Cheshires ears were pinned back and her eyes were wide in fear. Each villain was put into separate vehicles as Cheshire was placed in an ambulance with police escorts.
It had taken them three days to get all the statements and to clear Cheshire of all charges due to being forced against her will. It helped that she saved so many people. It also took them three days for the DNA test to come back with a match. Inko Midoria was sent for and came crying into the hospital looking for Izuna Midoriya. Izuna herself, aka Cheshire, was put into a medical sleep to help her leg heal without her feeling the pain of the bone knitting itself back together thanks to one of the doctors quirks.
So basically I was thinking of having Nedzu come in to see her, since it takes a lot of strategizing and luck to be able to save so many people without being caught. So she gets a Recomended spot, or can take the test even with missing most school since she was four. Bakugo planned on bevoming a hero to find and save Izuna, and thus would end up with an emotional (for him) reunion. Here's a small Omake for it.
Aizawa was a heartless cold bastard, and nothing would break that for him. But this child was pushing it with her goddamn cat looks.
He had been about to just outright fail her in the strength test when she gave him the most heart wrenching sad cat eyes, with ears against her head. He was stronger than this... which was why she was only getting one slot bump up for this.
She skipped back to the rest of the class, and Bakugo put his arm around her shoulders with a large smirk.
Aizawa totally didn't feel like he told her they ran out of catnip everywhere. He didn't.