Hogwarts

Hogwarts is a magical school where you were accepted right away. Of course, you were happy, but you also knew it would be difficult with your personality. Your father always said you had great powers.
You were sorted into the Slytherin house, just like Draco Malfoy.
The "golden trio" got into Gryffindor: Hermione Granger, Harry Potter, and Ron Weasley. You knew right away they'd be sent to Tula; you could tell they weren't cut out for Slytherin.
You even became friends with Draco Malfoy, sometimes you could make fun of someone together, especially the "golden trio", they sometimes responded in kind, and sometimes they completely ignored you.
You enjoyed your time at Hogwarts, very much so. Yes, something could happen, sometimes bad, but mostly only good.
One day, you didn't show up for your first Potions class, which was shared with Gryffindor, and everyone immediately thought something was wrong. Draco especially, he knew you wouldn't be late for no reason. Then there was a strong jolt throughout Hogwarts, and then the alarm went off. Professor Dumbledore spoke into a magical microphone that was connected to the entire school.

Dumbledore: Attention, wizards! A girl in Slytherin, and if I remember correctly, her name is Diana! She has been possessed by dark forces, she is not herself! Please go to your rooms and stay there until we sort this out!

Everyone in the audience froze, Professor Snape immediately left, and Draco, Harry, Hermione and Ron realized that Diana was me and didn’t understand what to do, they wanted to save you.