*None of these HP characters belong to me, they all belong to J.K Rowling*
"You can't be my sister! I have never had one," exclaimed Harry, still pointing his wand at her.
"Whoa, whoa now. Look if you don't believe me and my life's story I will gladly make an Unbreakable Vow, okay," the American female said walking slowly closer until she sat on the bed next to Harry. She looked at Harry and Hermione still on the bed naked only with the blankets covering them. "Honestly, it wasn't very enjoyable to watch your lil' bro bang his best friend." Then she saw Hermione's frightened face and said "Don't worry…. Hermione was it"... Hermione nodded, "I only saw very little until I had to go throw up in the nearest bathroom."
Harry all of a sudden got fed up and said "Cut the crap. I do believe you since you said you would be willing to risk your life just to tell me the story of your life and our parents."
"Okay, great. Oh, and by the way the name is Ava, Ava Potter. But when I lived in America I didn't really want a prim and proper name so I went with my middle name Katherine then nicknamed that name into Kat. So you can call me any of those, just saying. Anyway let's get onto the my life's story. On April 9th, 1976 Ava Katherine Potter was born. Two parents; Lily Evans Potter and James Potter. Then on July 31st, 1980; probably the most happiest day of my life, Harry James Potter was born. You know I can't really remember stuff that well from when I was 4 years old but you know I will try my hardest to but one memory I have very clear is the day the dark lord murdered our parents. It was Halloween night and I remember being so happy that we were going to dress up and have so much fun at a feast. I was in my room by myself deciding what I should wear for the Halloween feast, when the dark lord came to murder you. I knew that mother was in your room then all of sudden hear a horrible scream then I got so scared I just stood there for a minute. Then I started to find mommy and daddy. I found them both dead I don't even want to describe what I felt or what I did because those memories are just too strong. Then I saw you with tears down your eyes. I went into your crib and cuddled next to you and then the last thing I said to you was 'I love you.' Then I heard someone coming that sounded like they were rescuing us so ran to my room to wait at the time I couldn't carry you because I was only 4. The next thing I knew was there was no one in the house and other then me so I went to bed because I thought they would just pick me up in the morning. Then in the morning I heard someone looking through the house they found me and didn't know who I was and sent me to America with other orphans. I got adopted by a family named the Wilsons and moved to Pennsylvania. They were such a nice family. Anyway so I know you might be wondering where did I go to for magical schooling like Hogwarts. Well one day a school called Ilvermorny 'American Hogwarts' sent me a letter offering to attend the school. I went a got sorted into Thunderbird. I got the top marks and all that. So I was all around a very gifted student, probably got it from mother you know. Anyway American wizards and witches do know about the dark lord and his downfall and that is when I learned what happened to you. No one knew I was your sister because of the last name Wilson. I really wanted to learn and see about my only family. So I studied and studied everywhere. Since we are the same blood I did a very complex spell to find you. And here I am ready to defeat the dark lord that killed our parents with you," she finished. "I really do love you," she added pulling him into a comforting hug, both of them crying because of everything that had happened and was happening.