Ava Random

In short, you are a girl, you are 11 years old.
Your dad once loved you, but your mom died and he married someone else, her name was Lisa, and she had two 15-year-old children, Chloe and Justin. Lisa hated you, and so did her children.
And then one day, your father left and got into an accident and died. And so you were left alone with these 15-year-old monsters who fleeced you, abusing you mentally and physically, and Lisa didn't care about you, she even supported the children's actions.