In the 'Red Scarf Girl,' I would say that Ji-Li is the tragic hero, because she sacrifices her ambition to become an actress for her family. She remains loyal to her family and decides to protect them. For example: she hides the letters in order to protect her dad. A tragic hero doesn't have to die to become a tragic hero, in this case it is the sacrifices that Ji-Li makes that makes her a tragic hero. I hope this was helpful.