Mira The Jinxer

Backstory

I was a Slytherin student, I had some really great friends that I trusted with my live.
When I was in first year, my little sister and my mother died, I thought they had had a car accident, seeing as they were muggles.
When I went home for christmas, my father wasn't home, but there was police everywhere. Apparently, their death wasn't an accident, and my father was suspected for killing them. He fled the neighbourhood, and the police didn't find him anywhere.
I lived with my aunt from then on. When I was in fifth year, my father returned... He found me and my aunt in her house in July and he confessed of killing my mom and sister. He then proceeded to kill my auntie, and me... But he made it look like an accident, by letting the house burn down. I didn't want to let him get away with that, so I decided to come back as a ghost. I informed the ministry of magic about my father's actions, and they informed the muggle police.
When they arrested him Dumbledore let me stay in Hogwarts, as it had become my home/ safe-haven in the years before my death. I still help people with family, or other, issues. And I prank the bullies that pick on other children.