a character in a story who opposes the protagonist

a person who actively opposes or is hostile to someone or something

एक व्यक्ति जो किसी या किसी चीज का सक्रिय रूप से विरोध करता है

English Usage: He was seen as an antagonist to the new policy changes.

Hindi Usage: उसे नई नीति परिवर्तनो का प्रतिकूल पात्र माना गया।