Narrator

Narrator - a participant in the gameplay who narrates what is happening in an imaginary space or what he thinks should happen there. Depending on the style of play, driving, and the rules embedded in the system, this can mean almost anything. Common options:

storyteller - a leader who is the only one of the game participants who has the right to decide what actually happened in the game world and what remains desired - this word is officially used to describe the master in some systems;
"caller" in old-school games (for example, Basic D&D) - one of the players chosen to communicate with the master - in this version of the gameplay, the other players minimize their requests to the master and limit them to clarifying questions, and only the "caller" once and clearly reports whether the party is going right or left in the dungeon, what exactly they are doing, etc.;
The narrator in a story game is one of the equal players, currently having narrative rights and developing the next plot branch - in such games, the rights of the narrator are transferred from one player to another according to known rules.