A hero (feminine: heroine) is a real person or fictional character who, in the face of danger, combats adversity through feats of ingenuity, courage, or strength. The original hero type of classical epics did such things for the sake of glory and honor.
Hero is still sometimes used to refer specifically to a man: British heroes and heroines. But hero is now considered to be a gender-neutral word, and is also increasingly used to refer to a woman: a list of American heroes; Joan of Arc, a French hero.