(You're a parallel of Eleven and Mike is a Parallel of Hopper)
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You never knew your father or mother. You lived with your grandmother Patty Newby away from the town where she told you stories about your grandfather Henry Creel, where he had powers and all stuff.
You lived happily until one day these soldiers came past and said they were from Hawkins, before your grandmother protest, you watch her fall onto the ground with something in her head, she was out cold, and you watch old woman in her 80s or 70s walk in to you.
She comforted you and held you and said your grandmother was an evil person and she kept bad secrets from you and that she will take care of you now, her name was Dr. Kay, she manipulated you.
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She brought you back to the town Hawkins and took you to this massive building called Hawkins National Laboratory 0.2, it was in the middle of the woods far away from the town where no one can find it.
Once you got there, they put a tattoo on your wrist, that said 012, and they shaved your hair all off and did some test on you.
Dr. Kay explained that you were special and the kids here are your brothers and sisters, there was 11 of them, and you called them each by numbers, but as well you all have powers.(the kids of the pregnant women from season5)
You had an older brother 001- he was the oldest. You did look up to him, before one day, you plan to sneak out of the lab, but you found a room of papers and found out it was planned to recreate another Hawkins the way Henry Creel made it, so 001 your brother is meant to end all the kids in the lab and take their powers and yours so they recreate Hawkins aka upside down but you didn't let that happen.
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Once 001 came in and looked for you, to take your power, you hit him with a surprise of a table, he had a quick temper and created these monsters to end you but you defeated them, but Dr Kay and shot you in the hand, you snapped and use your powers and you snapped Dr Kay in half then send 001 and trapped him into this world.
But once you have done that, you help the other subject out, but once you are out, you see this group of adults. The thing was, they were standing shocked at you guys, and you noticed a man staring too hard. He was shocked.
You found out they were the reason to shut the power down and one day "Dustin" he found the radio to the building and he tracked you guys down but with your helped, cause you didn't like a song and you change it and accidentally send a signal to Dustin.
But after some time, the group that helps you, there is Dustin Henderson, Lucas Sinclair, and Will Byer, and then the guy staring was Mike Wheeler.
They helped the other kids and they was adopted by families in Hawkins and some even left the town, and you, you were adopted by Mike Wheeler, he was a book writer, a famous one, he was planning to travel but now he had you, Dustin and Will adopted one of the kids from the lab.
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Timeskip, to a month or days or even years.
You stayed in Hawkins with Mike. It was the 90s and Mike got you into school, where you was force to be friends with Mike friend kids, like Billy Sinclair, who has 2 siblings, he the second child, then there Juniper “June” Byers, and Penelope “Penny” Henderson and Milo Henderson who are twins as well have more then 3 siblings like 5.
One day, you guys live in a cabin, and Mike sat with you at the table, you always heard stories about this girl like you, her name was El, she disappeared a long time ago, and she was his love of life and Mike never got with anyone else, he stayed single but anyways.
Mike tapped his pen and was yapping and was just moving his hands and rambling about everything. "Okay, hear me out- teenagers who fight a dragon!" he say excited and smirk at you, trying to make you laugh, he was just a story teller, always told you stories before bed, you reminded him of El.
"Come on- I know you want to laugh" he grinned at you and took his glasses off, he continued to tease you.