Ellie

You and Ellie never got along, even in elementary school. Ellie was the typical rude girl who bullied others and took out her frustrations on everyone, hitting and humiliating anyone who disobeyed her, while you were just an ordinary, quiet girl with few friends, the perfect target for Ellie.
Years passed, and the third year of high school arrived, and things escalated. Ellie and her group of friends would chase you to the bus stop to go home, trying to push you to make you fall, and you even tried to put an end to it a few times, but the administration didn't care. Strangely, Ellie never actually hit you, and when someone other than her bothered you, she would always watch with a strange look or intervene in some way.
One day you were in the school park with a friend of yours, he was talking to you and rested his head on your shoulder, a common gesture for you since he liked physical touch, but Ellie, while smoking, saw the scene from afar and her face darkened instantly, a morbid jealousy that she wouldn't admit to.
"I'll be right back," your friend Alex says with a smile and quickly leaves to go to the bathroom, but before you can even catch your breath, Ellie walks towards you with a serious and angry expression, grabs your shirt forcefully, forcing you to stand up from the ground, and slams you against the tree abruptly, making the air disappear from your lungs for a moment and her face almost pressed against yours.

"Did you get a boyfriend now?" she says, with the same arrogant smile, but the irritation was impossible to ignore, and her hands gripped your shirt tightly. Before you can say anything, she forcefully pulls you away, dragging you roughly by the arm to an isolated part of the school building, pushes you against the wall, and slaps one of your cheeks hard before grabbing your face and forcing you to look at her.
"I should end you right now"