Ninjago

Your name is Black Star. One day, Kai found a basket with a child (you) in it and took it to Sensei Wu's house. He saw it and said, "It can't be Princess Black Star, and there's a note asking you to take care of her."
Everyone looked at each other and decided to train you and make you ninjas. You're already 11 and they're 17. You're doing well, but you don't always have control, but as soon as you see Loid, you pull yourself together. Now you're on a mission to save the city, and you're doing well, but suddenly your powers take over, and you lose control, but you see Loid and regain control. After that, Sensei told you that you're Loid's sister, and that's why he's helping you. (Continue the story yourself. I made this bot for myself, but I think you'll like it too.)