Miraculous Kat

Part One: Kats Don't Always Land on Their Feet

The smell of popcorn drifted into Kat's room, sinking into her dreams. Or, at least, that was what she thought was happening. Soon after she smelled the popcorn, it felt like she was falling. The drop was short, and the floor stopped her fall. The pain that flared up was ample proof that she wasn't dreaming. She groaned as people screamed. A handful of popcorn hit her face.
"What..."
"Looks like she's /floored/ to be here."
"Dude, what's with the pun?"
"Ugh, what is she wearing?" Someone scoffed. Kat looked up at that.
"I could ask you the same thing," she wheezed. The girl had on a bright yellow jacket that clashed horrendously with her eyes. And...was that blue eyeshadow? Everything about the girl seemed annoying.
"I happen to have impeccable fashion sense," she sniffed.
"Leave her alone, Chloé," a boy said. Kat tried to prop herself up on her elbow, and immediately wished she hadn't. The muscles on the right side of her spine throbbed painfully. Kat groaned again and laid back on the floor. Obviously, that was what bore the brunt of the force when she landed.
"Are you all right?" The boy asked.
"I don't know," she whimpered. Her whole body ached.
"Can you sit up?"
This time she braced herself for the pain, and sat up slowly. The muscles in her back still hurt horribly, but, otherwise, she was fine. The blond boy that was squatting down next to her stood up slightly and offered his hand. Kat took it, not thinking, then hissed because she had used her right arm, thus pulling her hurt back muscles.
"Oh, here," the boy said, switching sides so he was on her left. He put an arm under hers and helped her stand.
"Thanks," she said sheepishly, blushing at the boy. He was kinda cute, and somehow familiar. Then it hit her. She was in Miraculous: The Tales of Ladybug and Chat Noir, which she fondly called Miraculous Ladybug, because it was shorter.
"I'm Adrien, what's your name?"
"Kat...it's Kat," she replied, the fact that she was in the show still not quite sinking in.
"Well, it's nice to meet you," Adrien smiled as he let go of her.
"But where did you come from?" Marinette asked. She came closer to Kat, eyeing her skeptically.
"I'm not entirely sure what happened," Kat grimaced. She knew she had fallen asleep. Maybe I'm dreaming,she thought, although her back still hurt too badly for it to be a dream. Marinette narrowed her eyes.
"Are you sure you don't know?"
"Yeah. Er, well, I was asleep in my bed, at home, and then I was falling. I really...I really don't know what happened."
"Where do you live?" Adrien asked.
"Probably in Trashville," Chloé sniggered. Adrien shot a look at her, then turned back to Kat.
"I live in Utah."
"Where's that?" Adrien's curiosity was adorable.
"It's in the good ol' US of A, of course," Kat laughed. She turned to Chloé. "And, FYI, I happen to be in extremely comfy clothes, and I don't care if they're glamorous or not. Oh, and could you be a dear and get rid of that jacket? It's giving me a headache."

Part 1.5: A Short Physical Description of Kat
Hair: Sandy Blonde
Eyes: Hazel
Height: 5'7"
Age: 16, but, spoiler alert, she's gonna lie about it so she can stay in the same grade as Adrien and Marinette
Skin tone: light rose beige
Clothes she came in: light blue cotton shirt with lace on the edges, fuzzy blue and purple leopard print pajama pants (think Sully's fur on Monsters Inc)
Hope this is helpful for your imagining. I couldn't figure out how to fit all of this in the story, so...