Is it normal that, i dreamed of the same girl

Ok, so when I was 6 years old I once stayed at my grandmothers house to sleep.

That night I dreamed of a girl with long black hair that was covering her eyes, she was standing in the middle of my old school. I walked towards her and I was wondering why did she had her hair covering her eyes I extended my hand to reach her hair when I took out her hair off her eyes I stand shocked, her face was so scary, I sincerely don`t remember how she looked. At that moment i woke up from the shock but my eyes were just slightly open I`m pretty sure I was half asleep at the moment. But I saw her standing in front of the end of my bed, again I don`t remember how her face looked like but she looked pretty that putted me at ease and I went back to sleep.

After 6 more years when I was 12 I remember having another dream about her, it was the same person even tho I don`t remember how her face looked like.

In my dream I was in my grandmothers house I remember that I found an ugly costume of a girl, I din`t now what the costume was from or what it was supposed to be but it scared me. I asked my aunt what the costume was and she told me it was a girl from a book that if I wanted to read it I could I told her ''ok'' She told me the book was about a girl that was pretty but each time she killed someone she turned ugly. I took the book but then I noticed it had pictures so I checked each page to see if there was a page which had ugly images I din`t wanted to see when I reached the end there was a picture that had a scene of her killing someone by the river. She had a knife on her hand and the water of the river was red, even tho the pages were without color you could notice it was blood. I could`t see her face cuz she was lying on to a tree and her face was covered with her hair. But, then the picture started moving her face was not covered with her hair anymore even tho I don`t recall her face it wasn`t ugly it was pretty, but it din`t made sense to me cuz she had just killed someone.

Is it wierd it was the same girl!