Genre refers to categories of creative works that share similar characteristics or conventions. Thrillers are a genre defined by suspense, exhilaration, mystery, and often involve crime and conflicts of good versus evil driven by a villain's plot. The protagonist in a thriller is the main good character, usually the first seen, who tries to help others such as leading a group, as exemplified by Harry Potter. Thrillers can be further divided into subgenres like political thrillers, psychological thrillers, and conspiracy thrillers which are demonstrated through examples of popular films.