Short answers, pulled from the story.
A non-player character is a figure in a tabletop role-playing game that is not controlled by a player but is instead projected by the gamemaster. These figures serve as the supporting cast to the player characters who drive the narrative forward. They can range from mere sketches lacking statistics to entities with complete skill sets and histories.
In early video games, the non-player character was born from the need to populate a world without human hands using predetermined behaviors and scripted responses. These computer-controlled figures were distinct from enemies or mobs and carried a connotation of neutrality or helpfulness. The technology evolved from simple monologues in floating text boxes to complex branching dialogue trees pioneered by Black Isle Studios and White Wolf, Inc.
The evolution of non-player characters reached a new zenith in 2023 when Replica Studios unveiled AI-developed non-player characters for the Unreal Engine 5. In cooperation with OpenAI, these entities enabled players to have interactive conversations with unplayable characters that felt remarkably human. This technological leap coincided with a cultural phenomenon known as NPC streaming which became popular on TikTok in 2023.
From around 2018, the term non-player character transcended its gaming origins to become a potent insult in online culture. The label was used to suggest that a person was unable to form thoughts or opinions of their own, effectively reducing a human being to a scripted entity. This concept was often illustrated with a grey-faced, expressionless version of the Wojak meme.
In the Champions game and related systems using the Hero System, a character could have a DNPC or dependent non-player character controlled by the gamemaster but managed by the player. This dynamic meant that the player's choices could put these dependents in harm's way, creating a moral weight to their actions. When a player character was injured or unable to act, they might temporarily take control of an NPC to maintain the flow of the game.