Lol, this reminds me in Neon Genesis Evangelion's Rei Ayanami

Rei Ayanami is a clone made of Shinjis Mother and Shinji. She doesn't get older, so if her father wants her older, he must kill her and create a new one.
He never must kill her, once she got killed by a woman, once suicide and killed by angles.
Every new Rei looks exactly the same, but can't really remind on her old knowledge. But she knows that she is a clone. Very interesting story - watch the new movies!