Gravitation

Like a sledgehammer

I included this in case someone was curious but too lazy to look it up. It's like a hamster's meth hallucination or something.

An hour before the meat tenderizing incident...

It's not that Miku really did make a habit of picking on anyone let alone senpai no matter how annoying and superior he acts most of the time so it came as a surprise to more than a couple people that that's how it ended up turning out at the time. She generally did her best to avoid any of those guys that did the provisional license exam anyway since they had the tendency to act like douch bags even though two of them failed miserably and had to either retake the test or wait til next time...now that she thought about it didn't one of those asshats go missing?
All the same she was doing her own thing out in the quad with her classmate Tsukime as usual. She didn't fret about grades or her own exam it was pointless and maybe they were being a little bit more destructive than usual they both had high end reduce-your-surroundings- to-rubble sort of quirks but meat-senpai crossed a line that time. Not that Miku couldn't say she didn't by never remembering his name or anything...
"Throw it, I got it," Tsukime said adjusting the hat they made them wear at that stupid school.
"Okay...Go!" Miku with great irresponsibility and greater relish reversed the gravity of a cinder block to make it fly when she hurled it at her friend with no regard for her safety.
Likewise Tsukime didn't so much as blink as the ten pound square rock came at her like a missile just blasted it apart reforming it a split second later as a cloud of dust that Miku followed her other attack by generating friction on her palms and clapping her hands igniting a super heated cloud of death that Tsukime pulled into a single point creating something close to a miniture sun that collapsed in on itself as Miku again used her gravity to make it spin rapidly.
Why? To make a black hole of course. It didn't work but it sure made a lot of noise.
"Ah, oh well." She didn't regret scaring anyone or breaking about a hundred rules at all.
Or wouldn't have if that snotty turd senpai not shown up to call them disgraceful. Not that they weren't. Only she didn't want to hear it from his annoying piehole.
"You have no idea at all how lucky you are to be here do you?" Meat-senpai fussed like someone's mother-in-law.
"I don't really care. "Miku admitted remorselessly. This place was just a garbage dump for unwanted kids to her.
"My brother told me to be here. I'd rather be at the house helping to revive our family." Tsukime was also completely indifferent.
"Oh yeah,Mii , you're a proud oujosama of a mafia family. Ugh, I heard what happened to Kai-san. Hope he's alright." Miku said sincerely .
"Aniki  isn't so weak trash heroes and half- baked villains can crush his pride." Tsukime hmphed from behind the surgical mask she always wore.
Big germaphobe that she was.
"Are you two bastard brats even listening?" Meat-senpai was still there.
Crud, she'd hoped he'd get bored and prance off on his own.
"There's all kinds of bastards and we're just the parents not being married kind. Sadly, meat- senpai is the other one. " Miku commented airily.
"Filthy." Tsukime agreed.
"That is not my name!" And then he did the stupid thing.
He used his gross quirk on a person that had an automatic and unconscious self-defense ability.
Fire erupted at Miku's right side quickly crawling across to the left to rebuff his attempted meatball making then without a thought she concentrated all her power into one firey fist striking him with the force of swinging sledgehammer.
Then came the yelling from sensei and the stupid bickering.
Then came her dad, Endeavor.

-it's the rambling second part. I don't know why I write like this when I do it on my phone. About the thing with the cinder block that's a real thing . It's called a dust explosion. Please don't do that with or without a quirk.
The new girl Chisaki Tsukime. She's the mostly unaknowledged half sister  of Chisaki Kai aka Overhaul. She also uses that handle because as Miku mentioned she's a proud oujosama who was born to the yakuza and believes in that path.She also has the same quirk, hers is called Overhaul re:. I used the name Tsukime because the characters in it or on the more precise" tsukimi" are moon and ocean. Kai can mean sea.
Miku's given name is from saya the sheath for a katana.
Miku is a hybrid so has two quirks. One is gravity control that can either increase or negate the weight of something as demonstrated but has other skills too. Her other power is totally defensive called 'a fire that won't go out'. This will block most contact type attacks. It works on its own but she can also gather it in her hand in and use it to hit so not to hurt her hand that's the gauntlet strike. An all over version is called ifrit.
Weirdly an ifrit is a demon but not a fire demon but I figure it's easily recognized by most people to get the picture on how the ability must look.
Well until the next time plus ultra. And a shout out to the people that own Azumanga Daioh and boku no hero academia Joker out