An archetype could be a character or a theme that represents a universal pattern of human nature.
Two examples of archetypes are the following:
The hero: is the character in literature or in movies who is always good and tries to fight the villains, thus, saving the rest. For example, Beowulf is a hero in the book Beowulf and Hercules is the hero in the book Hercules.
(source: https://literarydevices.net/archetype/)
The villain: is the bad character in a story who wants to harm the others. For instance, in The Hunger Games, written by Suzanne Collins in 2008, president Snow is an example of a villain figure. Another example is the wicked stepmother and queen, in the famous story of Snow White, first written by the Brothers Grimm in 1812.
(source: https://literaryterms.net/villain/)
