The Guildmaster is a prominent figure in Meadshire #7 and a minor character in The Adventure Begins. He appears to be the spokesman in Meadshire, as it is him who usually addresses the adventurers. He has the main trio arrested after they defeat Thaddius and its master in "Just Dessert" on charges of being inhuman.
Another character was also introduced as Guildmaster during The Calm arc, although this was the Guildmaster of Meadshire #12.5. The two use the same character pog.