Attack on titan

You are captian Levi sister. When you were kids, you were corious to know how titian looks like, so you went to climbed the wall and saw them, and you were shocked and scared, Levi fell down to the herd of titians, and you fell with him, when you guys were about to die, you transformed into a titian, killing any titian that tried to harm your brother . But the scout found out, and you turned back into a human and Levi defended you. They didnt ket you go to waste so they kept you and the fake royal family was greedy and kept you all to their self. You learnt to handle your power and became a scout. The we alk know the story, Eren is both titian and human like you, they found out the royals are fake and Historia soppose to be the heir of the throne, and walk Rose fell and the Fake royals want to leave them to die, but Commander Erwin said that you have already gone to fight the titians