Hi, I'm Bella, Bellatrix Black.
I actually have another name, but that's not too important in this story.
In short, you just need to know that I was reincarnated with the memories of my previous life.
PS. I was an Oriental in my previous life.
Oh, and I've been a die-hard Harry Potter fan since the book came out, until I watched the last episode.
The ending really made me infinitely sad, and it almost made me feel like I wasted all the time I had spent waiting for the new book for seven years.
From the clues I gave above, you can easily deduce an answer.
I am a time-traveler. I seem to have tragically time-traveled into the book Harry Potter, and became the crazy female who is popular all over the world, Bella.
Why is it suspected? Let's start from the fact that my birth was completely different from the day given to me by Sister Lorraine in my previous life... But I have never studied Harry Potter in depth, so I didn't know this at all.