My name is Clarissa Rose Potter. I have a twin brother named Harry, and our parents are Lily and James Potter. When Harry and I were a year old a maniac who calls himself Lord Voldemort attacked us. Our parents were out fighting his forces across the country, while we were being watched by their squib friend Arabella Fig. One of my father's friends, Peter Pettigrew, betrayed us and brought Voldemort into our home past the wards and Fieldius charm that protected us. Fig was killed but when Voldemort tried to kill my brother and I his curse rebounded, destroying his body and killing Pettigrew. Voldemort's spirit escaped that night, Harry was proclaimed the boy-who-lived, and a few months later I was left on a doorstep in the middle of the night.
Apparently my parents thought I was a squib and decide to dedicate all of their attention to Harry by forcing me on my mother's sister's family. After That Night, Harry had been showing accidental magic, floating toys around, while I had not leading our parents to believe I had no magic. No one in the Dursley household was happy with my appearance.
I spent the next seven years living in the cupboard under the stairs and forced to do all of the household cleaning and cooking. If I was lucky I got to eat two small meals a day. When I was three my magic started to show and the Dursleys reacted by locking me in my cupboard for a week. Every time I did magic after that the punishments got worse, escalading to a beating at age five. Unfortunately the abuse led to more magic being used to heal and protect me, which led to more abuse, in a vicious cycle.
By the time I was eight they had had enough of me and my 'freakiness'. Uncle Vernon drove me to the middle of London and kicked me out, telling me not to come back. I lived on the streets, stealing scraps of food and living in abandoned buildings for about a month before I noticed something strange. I started to notice some strange people who kept entering a strange pub that others didn't seem to notice. I questioned one store worker across the street about it but he thought I was crazy and said there wasn't a pub there.
Curiosity got the best of me and I entered the pub, though I almost walked right back out at the strangeness. The people inside wore strange clothes that looked like dresses in bizarre colors and patterns. The people themselves looked strange as well; some looked tiny with big ears and their skin a greenish tinge. Others were really hairy or slimy looking, and one man even had fangs. Then there was the tables cleaning themselves, drinks pouring themselves, and food serving itself. The pub was loud and a bit dirty, even though it appeared to clean itself.
I stood in the door way astonished for a moment before being pushed aside. I stumbled but caught myself on a stool at the bar. I backed into the shadowy corner to avoid attention and listened to the conversations around me. I learned that the pub was one of the gateways from the normal, or 'muggle' as they called it, world and into the wisarding or magical world. The traffic coming and going from a back room indicated the entrance to an all magic alley called Diagon alley.
I merged into the back of a group headed to the alley, trying not to be noticed, and followed them through the gateway into the alley. The alley itself was amazing. There were so many stores and people all strange and… well magical.
After that I spent many days in the alley wandering around, avoiding notice, and soaking it all in, trying to learn as much as I could about this new world. The book store, Flourish and Blots, and an old 'junk' store called Modge Podge quickly became my favorites. They let me sit and read for hours in the book store, and the owner of Modge Podge, Jake, told me stories about some of the strange instruments he sold. It was during one of my reading sessions at the bookstore that I learned about how to gain my freedom from the streets.
I devoured a book on Gringotts the wisarding bank run by goblins. It told me that I could go there and do a blood test to see if there were any vaults I could access. Apparently most pureblood families didn't try the test because they assumed they already had access to those they could, not thinking about any old vaults from families that had died out. Most muggleborns didn't about the test and wouldn't think to try if they did, because their families were muggles. According to the book the test was free but you had to know to ask for it.
I also found a book that mentioned my family. I was surprised and quickly searched for as much information as possible. I was disappointed and hurt to learn that my family thought I was a squib, and that they had abandoned me but kept and spoilt my twin. Before that I only knew what little Aunt Petunia had mentioned, like that they left me on their doorstep in the middle of the night. Until finding the book I hadn't even known I had a twin, let alone that he was famous.