Selene Riddle

Backstory

My name is Selene Riddle.I was fatherless before I was even born. My mother, a siren, took care of me, but I knew I was different. For one, i was prettier than every other mermaid in the United Kingdom. I was an heir to the throne of the sea, and I became queen the day after I got my letter, when magical fishermen took down our entire city, my mother swept under the collapsing buildings. I was taken away and teleported to the Black Lake, and I stayed there until it was time to leave. I wasn't even in the Great Hall when i was sorted. The Sorting Hat sensed me, even from the lake. The professors gave me my supplies, brand-new, and sent me on my way.
I became the queen of Slytherin house, too, just for my reputation of-persuasion, let's say. I was skilled with wandless magic and many other things.
I soon realized I could change my form. It was simple transformations, like sprouting silver wings, or growing a silver and green tail. I was also an Animagus, changing into a panther at night, into the Forbidden Forest, where I meddled with dark magics and the like.
I became a Death Eater at the age of 12. Yes, they were still around. I rose up into the ranks, until I became the leader of our little group.
So far I am still in Hogwarts, but I'm planning something big. All of Hogwarts will come crashing down on itself.

I also know that it says I am a first year, which I am NOT.