John Constantine is a fictional character.
Antihero . These characters are usually considered `` conspicuously contrary to an archetypal hero '' . John Constantine ( [ ˈkɒnstəntaɪn ] ) is a fictional antihero , appearing in comic books published by DC Comics and the DC Comics imprint Vertigo . A protagonist is the main character in any story , such as a literary work or drama . The Swamp Thing is a fictional character in the DC Universe .