who are the characters in nightmare before christmas

The Nightmare Before Christmas tells the story of Jack Skellington, the pumpkin king of Halloween Town. He becomes bored with the same old Halloween celebrations and stumbles upon Christmastown, where he decides to kidnap Santa Claus and take over his job. Other key characters in the film include Sally, Jack's love interest, and Oogie Boogie, a burlap sack filled with bugs and other creatures. There's also Lock, Shock, and Barrel, three mischievous trick-or-treaters who assist Jack in his Christmas plot.