John Stewart is a character.
John Stewart , known as Green Lantern , is a fictional superhero appearing in American comic books published by DC Comics and was the first African-American superhero to appear in DC Comics . A superhero ( sometimes rendered super-hero or super hero ) is a type of heroic stock character who possesses supernatural or superhuman powers and who is dedicated to fighting crime , protecting the public , and usually battling supervillains . Superhero fiction is the genre of fiction that is centered on such characters , especially in American comic books since the 1930s .