Shall I show you a True Shield?

Does the hero always win? All fairy-tales end when the heroes save the day, however, is reality like that? "I'm the Shield; my duty is to protect. If a hero is not enough, I shall become whatever is necessary. Devil, demon, Demon Lord. I need defense, defense that surpasses the gods. To protect those whom I've been left with, to fullfil my duty. I'm the Shield!" "I am the Shield!"