Mun

From Fandom wank wiki

Short for "mundane" or "human", a mun is the player of a sockpuppet in an RPG. The real person behind the mask.

Sometimes there is wank when a mun is discovered to be someone another mun hates outside the RPG. Sometimes wank happens when a mun leaves in a huff and the character gets passed to another player. Sometimes muns are just wanky people in general.