Note: I am treating Golden Experience like a quirk and not a stand. Just a quick warning before you read.
The super powers that everyone has within their genetic code started in China when a glowing baby was born. Soon after the world was put into a period of Chaos. A dark age of sorts. After these powers became more common in the new generation, they were accepted into the world as a normal thing. This new wave of superhuman abilities unfortunately skipped nearly 20% of the population. This included Izuku Midoriya, or so he thought at least. His quirk awakening came at a very convenient moment.
It had been another day of bullying from Kacchan. Izuku had ran to the defense of another classmate who had been pushed against a tree and who seemed defenseless against Kacchan's relentless assault of mini-explosions, as well as his punches and kicks from his lackeys. Izuku's classmate had quickly escaped when Kacchan and his gang and turned their attention to him.
"Why are you doing this Kacchan?!" Izuku shouted out through tears of pain as Bakugou had just sent an explosion at his face.
"You quirkless Deku!" Kacchan had shouted before pushing Izuku against the tree.
Izuku's back had arched as he hit the tree, spikes of pain running through his spine, similar to the feeling of hitting your funny bone. He was sad about loosing Kacchan as a friend, he had distanced himself and bullied Izuku ever since he was diagnosed quirkless.
Kacchan raised his right hand, about to go in for another punch on Izuku's face when an arm that was exactly the same size as Izuku's raised right arm flew from his shoulder, punching Kacchan in the stomach so hard he practically folded in half and fell over, holding his gut in pain, tears welling in his eyes.
The arm that had struck Kacchan was connected to Izuku at the shoulder. It was a pale gold in skin color with what was definitely armor on the shoulder and forearm, which was seemingly dark orange in color with small, white, stylized wings at the shoulder. The bicep and tricep were exposed, unarmored. On the back of the hand was a purple lady bug design with purple bulges on the knuckles.
After for what seemed like eternity, the arm pulled back into form with Izuku's right arm, falling into place and fading out of sight into his body. Kacchan's goons were quick to pick him up and run away at top speed. Izuku just sat up against the tree, stunned at what just happened.
"Is this my quirk?" Izuku asked himself as he looked at his right hand.
Izuku pulled himself up, the pain of his many bruises and burns flairing up. He slowly walked his way home, trying to summon that strange arm all the way.
It took roughly ten minutes of Izuku's walk home to cause the strange arm to appear again, it was almost completely see through as it followed the path of Izuku's arm as he waved it around. It was quite pretty honestly. The designs were very eye catching. The closer Izuku looked at it, the more detail was exposed to him. He admired at the beauty of the arm until he reached home.
Izuku, wanting to show his mother his quirk, he rushed inside and immediately started talking to his mother.
"Mommy! Mommy! I got my quirk!" Izuku shouted with that special energy all children seemed to possess.
Izuku's mother was quick to stop doing the dishes she had been doing when Izuku entered the home and rushed over, picking Izuku up and spinning him around while hugging him tightly.
"I am so glad sweetie!" Inko said. She was so proud of her little boy. She felt guitly for months after Izuku's visit to the doctor's office where he was told he was quirkless. Her Izuku was mopey the entire time, his dreams were crushed and his own Mother hadn't encourged him, she mearly hugged her little boy and said she was sorry.
She snapped out of her thoughts as she started talking to Izuku again.
"Okay Izuku, how about we go to the doctor to register your quirk tomorrow? It isn't a school day so we can manage it, how does that sound?" Inko had said it in an enticing tone to hype up Izuku.
"Yes!" Izuku said while being set down by his mother.
Izuku had rushed off to put away his school things in his room before sitting down at the dinner table, not even noticing what he was eating and rushed off to bed, almost like he was trying to skip through the day so he could go register his quirk. He had laid down and slept through the night.
The next day Inko and Izuku had hopped in their car and driven to the Doctor's office to register Izuku's quirk. Izuku bounced in the back seat the entire way, full of energy.
They had made their way into the Doctor's office and sat down, Izuku explaining the arm that had appeared out of his shoulder.
"It was the size of my arm and it was yellow and it had this cool orange armor part on the arm with a fancy white wing design on the shoulder!" Izuku said, practically going light speed with his speech.
The doctor simply wrote, "Yellow skin with orange armor on the arm and a wing design in white on the shoulder. Linked to person's size?"
"How did it first appear?" The doctor asked curiously.
Izuku stopped looking so excited at that, now very nervous looking. The two adults shared eye contact in suspicion.
"Well...Kacchan was picking on me and the arm punched him in the stomach and he fell over..." Izuku said slowly with a hint of fear in his voice.
Inko's eyes widened at this, her son's best friend was picking on him? How come he didn't say anything before? Was he intimidated into staying quiet? Questions flew around Inko's mind faster than even All Might could react.
The doctor, now breaking the awkward silence now present in the room, "Looking over my notes, which aren't very much, this is an emitter type quirk as it is generating what seems to be another body out of your original body and reacts naturally though I suspect you can probably summon it with just some focus, it also appears to possess more strength than the user, so it may be taking your strength and multiplying it by an unknown factor." The doctor had ended his analysis of Izuku's quirk as more of a question rather than answer.
"And, if your quirk evolved in some way or develops new abilities, just come on back to me and we can get that onto the profile of the quirk. Now that the figuring out what your quirk is part is done, you just have to name it." The doctor told Izuku.
Izuku stared at the floor, thinking about the arm that had appeared out of him, focusing on the beautiful skin color, Izuku had found the name of his Quirk.
"I want to call it 'Golden Experience'." Izuku said, now hyped up about his quirk.
"Very well." The doctor responded, writing at the top of the page of the quirk analysis.
Izuku bounced up and down in his chair as he watched the doctor get up and log the quirk into the computer in the room, now thinking of all the ways he could become a hero.
If you think this is being rushed, as in, events are going to fast, there is not enough detail, please post that in the reviews, I really want to make this a high quality bit of work, thanks!