Lord Voldemort is a character and the main antagonist in J. K. Rowling's series of Harry Potter novels. The character first appeared in Harry Potter and the Philosopher's Stone, which was published in 1997, and returned either in person or in flashbacks in each book and its film adaptation in the series except the third, Harry Potter and the Prisoner of Azkaban, in which he is only mentioned.
Ralph Fiennes as Lord Voldemort in Harry Potter and the Deathly Hallows – Part 1
Young Tom in his fifth year at Hogwarts as played by Christian Coulson in Harry Potter and the Chamber of Secrets.
Ralph Fiennes portrays Voldemort from Goblet of Fire to Deathly Hallows Part 2.
An antagonist is a character in a story who is presented as the main enemy and rival of the protagonist.
King Claudius, the antagonist, is married to Queen Gertrude in William Shakespeare's Hamlet.