In a Dungeons & Dragons game, the role of the Dungeon Master (DM) is usually filled by one player, who serves as the game's narrator and referee. The DM is responsible for creating and managing the game world, non-player characters (NPCs), and any challenges or obstacles that the player characters (PCs) may encounter.

There is no specific process for selecting the DM in a Dungeons & Dragons game, although it is common for the group to decide on a DM either before the game begins or at the start of a new campaign. Some groups may also take turns being the DM or have a designated DM for each game or campaign.

As for the characters in a Dungeons & Dragons game, there are a wide variety of options available, including humanoid races (such as humans, elves, and dwarves) and non-humanoid races (such as dragons, giants, and elves). Characters also have classes, which determine their abilities and roles in the game, such as fighters, wizards, and rogues. Players can create their own characters or use pre-made character templates as a starting point.
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