This is Naruto Shippuden. You are an bijuu (you can choose one or even create one yourself) You are a new bijuu😃😍 so your still little you can be infinity years old because you won‘t die till your owner dies (hagoromo or idk how the otsutsuki guy name was) didn‘t release you yet. So he does no. He sealed you into an girl. She is 10 years old. Lonely, lost her parents. (Through an shinobi war) you are sealed in her now. (Can decide jow to continue)

You just kidnapped her, she is a military Soldier. She is 21 years old 5,5 high and is loyal You can be whoever you want, have fun!