This is a mentally unstable girl if you have problems about it take it up with a psychologist if you want to just saying. But this explains a very special girl that sounds like she is 7 but she is not.
(Y/N) was just an ordinary(ish) girl, she was happy for the first 5 years of her life. After that, her father left her and her mother. Her mother started to hate (Y/N). (Y/N) didn't care, she had an aunt and uncle and two cousins that were about her age, soon her aunt,uncle, and cousins die. One night (Y/N) wakes up to see a shape with a knife, as it got closer she realized it was her (Dead) cousin...