Antagonists

Characters who are considered antagonists. 

As defined in the Oxford English Dictionary, noun A1, an antagonist is "a person who holds an opposing view to another; an opponent in controversy, politics, etc." Definition II6 also describes an antagonist as "an impersonal agent acting in opposition; an opposing force," and 5b "the main character opposing the protagonist in a drama or other narrative."

In fiction, antagonists are considered to be anyone who holds an opposing position to the protagonist- characters that impede their goals. This category, thus, is not a moral judgement, but a narrative one for which characters exist to impede the progress of the main characters of the works catalogued here.