The Gifted One ❁Eren's Older Sister//AOT fanfic❁

My name is Kassandra Yeager. I am the youngest and only daughter of Grisha Yeager and Dina Fritz, the little sister to Zeke Yeager and the older half-sister to Eren Yeager. Zeke betrayed our parents, causing them to be taken to Paradis Island to be punished, unbeknownst, somehow I was taken with our parents. So, at the age of 1, I was turned into a 5m titan.
For 7 years, I roamed Paradis with the other Pure Titans, until one night I was sleeping in a tree in the forest when I met Ymir the goddess. She gave me a gift, for I was the youngest person to ever be turned into a titan and she pitied me. She gave me a gift to be a titan shifter, but I was different than the others. I wouldn't die after 13 years, and I shared the gifts of all the nine titan shifters. After I turned human, I aged abnormally. By 6 years later, I was 19 years old. I knew my father had started a new family within the walls, and I had a little brother.
Somedays I would sneak into the walls at night and meet with my little brother, Eren, with his friends, I wanted to be involved with him in his life, but without letting him know I was related to him. I told him my name was Sandie, so he wouldn't know. His future would not be an ordinary one, but I will always be there to protect him, always and forever.