Claim: John Stewart is a character.
Evidence: 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 -LRB- sometimes rendered super-hero or super hero -RRB- 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.