heel role; villain role
Used in professional wrestling, movies, and similar entertainment to refer to the character who plays the antagonist or 'bad guy'. The term is a direct borrowing from English 'heel' plus 役 (role).
See also: ヒール
He plays the heel role in professional wrestling.
That actor always plays the villain in movies.
Compound of ヒール (from English 'heel', meaning a villainous character in wrestling or entertainment) and 役 (role).