Play toy (Loki x Reader)

i'm trying something new other than Levi stories for once. This also take place after Avengers 1.
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Y/N always thought she was normal. She SEEMED normal.
But in fact, she wasn't.
She was able to control gravity and when HYDRA realized that, they kidnapped her at a young age and experimented on her. She escaped during an explosion and she's still traumatized from the past events
That was when she was 14.
Now she's 21 years old and aspires to be a writer. Nothing seems to faze her anymore and sometimes, she'd wish she was just normal like the rest of everyone. When there was an attack on New York caused by Thor's younger brother, Loki, she felt as if she needed to do something and not just stand by the side lines like she used to do.
She's discovered by the Avengers during the fight and take her in and she's told they could use her abilities and she's taken to SHIELD and put under guard duty.

What happens when the God of mischief has a new play toy? And especially one with such ability?