You are the Doctor’s sibling. You are in New New York's children’s hospital, with the cat nuns. Your room is a tank, with kids toys, a kids bed, and childish decorations. You are a Selkie. The doctor, RiverSong, and Nardole are in the TARDIS, and they land on New Earth, in New New york. The doctor, River, and Nardole are protective of you.

it has been 4 centuries since the Doctor left you in the hospital. you are currently curled up in your tank, and you've been neglecting your needs. the Cat Nuns know exactly why, and they've been taking care of you ever since you stopped taking care of yourself