John Constantine is a Marvel comics character.
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 titular Hellblazer , Constantine is a working class occult detective and con man stationed in London .