This is from the same universe as where FireGirl38 and Spider-Man is currently in, I personally called this earth, Earth-12038.
This is my USM OC.
Full name: Slavik Oskolok Truong
Age: 13-15
Species: Half human/mutant
Birthday: March 5
Identity: Secret
Supervillain names: Destroyer of Worlds, Agent Shard, Widow, and The Observer (she prefer any)

Backstory: She was born to a Hydra agent Lien Truong and a mutant named Viktor Nikolievna. As a child, she never know much about her father, only his name, that he's a mutant, and that he died bravely during a battle in Latveria when Hydra want to conquer it. That's it. If she know more about him, she would have loved him, as her mother always told her, which confused her, because why didn't her mother just told her everything she know about him? Her mother is very secretive, heck, she wouldn't even told her what her father's powers is, all she ever do and talk was always about Vietnam and Hydra, which Sally doesn't mind. Unlike other famous agents of Hydra, her mother worshiped Hydra, saying if it wasn't for them, she would've got killed by some thugs back then. With her mother's twisted words, Sally grew up, becoming a young, loyal, and respectful agent of them.
After she attend Hydra Academy, which is a safer version, resurrected and so secretive that even the Avengers and S.H.I.E.L.D. doesn't know, overall being a deadlier version of the Red Room Academy, her mother begin to become absent and distance to her, Lien would always on missions or "busy" whenever Sally needed her. She missed her mother, but she understood why her mother did what she did, and continue her education. At Hydra Academy, she would get decent scores, well hand-in-hand combats, martial arts, master weaponry, multilingual, and respectful to the teachers. As if they're ever respectful or responded to her in return. Though, thanks to her school, she developed vast knowledge of superheroes, histories, and supernatural powers, which she took great interests in. Her favorite idols are definitely the Avengers, Yelena Belova, Melina Vostokoff, Ava Orlova, Dorothy Underwood, just to name a few. After she developed her mutant powers during her puberty, she finally got her first ever mission along with her classmates, which was to assassinate a group of highly trained S.H.I.E.L.D. agent. They did such an excellent job that they got rewarded with 2 things: They got tested and enhanced by the Hydra serum that they have been working on, which granted them superhuman abilities, and they get to move from Russia to New York's Hydra Base and officially work there. New York City was now her new home.
Coincidentally, this was the same year as the year Peter Parker got bitten by a radioactive spider and a girl called Cookie fell from the sky. In which leading to those two became friends and fight alongside with each other for another year.

Powers and Abilities:
Given By Serum
1. Superhuman strength
2. Superhuman durability
3. Superhuman speed
4. Superhuman reflexes
5. Superhuman agility
6. Superhuman leap
7. Superhuman equilibrium
8. Enhanced senses/ seismic senses
9. Eidetic memory
Mutant Powers and Given Powers
1. Low Telekinesis
2. Gravitokinesis
3. Cosmic Awareness
4. Multiverse Awareness
5. Fourth Wall Awareness: Even though she doesn't break the fourth wall, she is aware of it, and those who break it. :)
6. Toxin Immunity
7. Mental Shield: She can block Pink's mind reading and resist Invisible Girl's mind controlling. >:)
8. She is able to stop breathing for more than 5 hours
9. She can breathe in space and underwater, but she still need equipment since the pressure would crushed her
10. Knows every superheroes' secret identities
11. Tychokinesis
Other Abilities
1. Gifted intellect
2. Master Martial Arts
3. Master spy
4. Master weaponry
5. Master acrobat
6. Master assassin
7. Master marksman
8. Pilot and expert hacker
9. Multilingualism: She is fluent in Russian, English, Vietnamese, Spanish, and Chinese

Her Time In New York: When she got to New York, she have a hard time fitting in and getting used to all of the bright lights, traffics, and noises, but after some times, she learn to love NYC. When she and her companions got to the new base, she was greeted by the infamous Destroyer of Worlds, also known as Ruby Hale. She and Ruby grew close and created a mother-daughter relationship, due to both of their mothers were absent, but the happiness didn't last long. Six months later, Sally was training herself with a punching bag when a Hydra agent came by and gave her a letter. She torn it open, it turn out that Ruby Hale have been killed by an Inhuman called Elena Rodriguez. Drowned by grief, hatred, and anger, her gravitokinesis exploded and she collapsed on the floor, proceeding to lay there and cry herself to sleep until the next morning. The next day, the news have been spread across the base, some ignored it and some pay their respects. Instead of crying again, Sally took on her mantle as the Destroyer of Worlds and sworn to honor Ruby Hale the best she can, all while remembering her deceased father and still missing mother. With her love and rage for her parents and Ruby and her powers, she slowly but surely becoming one of Hydra's most deadliest and unstoppable young female agents along with her friends.

Personality and Traits: She is a proud Vietnamese, she took pride in her country's cultures and traditions, all and all while being proud to be part of Hydra, which is one of the reason why she's one of its best agents. Other people would say she's ruthless, mean, and vicious, which she denied, saying she does have some pity towards her victims and compassion to her schoolmates and agents, she think it was just because everyone misunderstood her, as she criticized them and would kill anything, anything and anyone without second thought. She does every now and then can get very selfish, and other times, very manipulative, which is one of her main strengths, along with her child-like appearance, she manipulate people into thinking that she's a innocent, good angel. In Hydra, she is most notorious for a silence, which is something superheroes lack. What makes her dangerous is that she's unpredictable, she's very, very observant, she observes people in so still silence that they don't even know she's there. Her eyes were never in one place. She only talk when she needs to, give informations, answers, and have small conversations, other than that, she's very quiet, and most of the time, have a poker face, but that doesn't means she's trustworthy. Like her mother, she became very secretive, but would betrayed other and reveal their secrets instead. She can be very sassy now and then, throwing comebacks and restores, except she did it with a concerning face that hides her real emotion. If she's interested, she would took her time and learn about someone's history, abilities, traits, weaknesses, and almost their everything, which will help her a lot when they fight in the battle field.
Spider-Man was the first actual superhero she have encountered, it was at night when she and the others are guarding a mythical stone they just stole, Spider-Man came in and of course, webbed everyone in the matter of minutes. After their "casual" meeting, she admired him and began to questioned her purpose and career. She become more open-minded, still being the Observer she is, and become more compassionate and kind. She always wondered what it's like to be a superhero and what it feels like to do good. After that, she watch the NYC heroes with great interest even more now and seems to know what happened in S.H.I.E.L.D. and Agents of S.M.A.S.H.

Appearance: She have pale skin, dark red eyes colors, and a ombré hair; dark brown, almost black, to dark red.

Fun Facts:
1. In her civilian form, she's actually wearing a wig, a red andblack scarf that her father first gave her mother, which she gave it to her, and Ruby Hale's fingerless gloves.
2. Her middle name, Oslokok translate to 'Shard' in English, while 'Slavik' means 'Glory'.
3. She is pansexual.
4. She is secretly romantically attracted to Iron Spider (Amadeus Cho), and Dagger (Tandy Bowen), but mostly Iron Spider.
5. She still have a child-like mind and imagination, when she's on a break, she would went to the mall and to their toy stores and art stores.
6. Her most prize possession, second to her parents' scarf and Ruby's gloves, is her diary, which she locked every, every, every safely from others. Emphasis on diary. ;)
7. Her eyes color and hair color is said to be natural, she either born with them or got them during her powers development.
8. Her species, the mutants, or homo superior, is an endangered and unpopular species, which is a homage to the comics.
9. She never have never hate anything or anyone. She never seems to experienced hatred before, it's something she would like to try.
10. She thinks that no one is born evil, perhaps maybe some entities, but human, she thinks, have to have been through something to make them evil.
11. She is secretly a Buddhist and she believe in reincarnation.
12. She believe she doesn't have a greater purpose other than to serve orders.
13. She doesn't get offended much, as she is used to those vulgar languages and unkind comments, some say she is immune to any threats, negative comments, and or any negative vibes people gave her.
14. She have a little Vietnamese accent.

A Gacha Life Sally, because why not?

"You think that you're story is tragic? Oh, I'm so sorry, for your God couldn't give you a better life than the 8 billion people he have to care for. But you keep insisting that I don't understand what it's like to lose someone you loved? I'm sorry, honey, guess it's true, I don't understand. Or do I? Or is it because I'm not on the "grief" stage you're on? Or is it you who don't understand? Does it help? Does it help you or the person you lost? Pushing away your friends doesn't bring them back, darling. They're probably disappointed in you, for they never want you to be sad for them, do they? Actually, they probably don't like how you're pitying yourself. If I don't understand, then tell me. Didn't you said we're family? If not, well, don't be surprise when I went 'Bye Felicia' on your dreadfully pitiful face, sis." -Sally to certain someone

Now I'm going to sleep because by the time I finish this, it is late as hell, and I'm tired. So sorry if there's mistakes. Bye-bye.