John Constantine is a fictional character.
An antihero , or antiheroine , is a protagonist who lacks conventional heroic qualities such as idealism , courage , or morality . Hellblazer . Its central character is the streetwise magician John Constantine , who was created by Alan Moore and Stephen R. Bissette , and first appeared as a supporting character in The Saga of the Swamp Thing # 37 ( June 1985 ) , during that creative team 's run on that title . John Constantine ( [ ˈkɒnstəntaɪn ] ) is a fictional antihero , appearing in comic books published by DC Comics and the DC Comics imprint Vertigo . He serves as the lead character of the comic books Hellblazer ( 1988 -- 2013 ) , Constantine ( 2013 -- 15 ) , Constantine : The Hellblazer ( 2015 -- 16 ) , and The Hellblazer ( 2016 -- ) . The Swamp Thing is a fictional character in the DC Universe .