What constitutes the hero of a piece of fiction such as Don Quixote?

The hero of "Don Quixote" is a noble and idealistic character who is on a quest to achieve greatness and uphold chivalric values. Despite being delusional and sometimes foolish, he possesses a strong sense of courage and integrity that drives him to right the wrongs he sees in the world. Ultimately, Don Quixote's dedication to his beliefs and his unwavering determination make him a heroic figure.