A hero is a literary figure who is a person of virtue, and usually the protagonist of a story. They usually believe in honour and have strong morals. A well-known example of a hero would be Luke Skywalker from the Star Wars films.
It also means:
- A person noted for special achievement in a particular field.
- A person noted for feats of courage or nobility of purpose, especially one who has risked or sacrificed his or her life. 
- The name of a character in Much Ado About Nothing by William Shakespeare.
- Hero of Alexandria, a first century Greek engineer/inventer