Mudmug is a pandaren encountered by Chen Stormstout and his niece, Li Li, on their way from Shang's Stead in the Valley of the Four Winds. He enlists their aid in dealing with his virmen issues near his home, then treats Chen in kind by helping him in his quest for the Stormstout Brewery. Mudmug is a quest giver in several locations throughout the valley. He reveals that "Mudmug" is also not his real name. It comes from the fact that, as a brewer, he uses muddy water in crafting his beer.