John Constantine is a character.
An antihero , or antiheroine , is a protagonist who lacks conventional heroic qualities such as idealism , courage , or morality . 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 . Empire ranked Constantine third in their 50 Greatest Comic Characters of All Time , while IGN ranked him No. 29 in their Top 100 Comic Book Heroes , and the character ranked No. 10 in Wizard '' s Top 200 Comic Book Characters of All Time .