From Homestar Runner Wiki
The Blacksmith, like The Poopsmith and The Little Chef Guy, was asked by Homestar Runner and Pom Pom of the whereabouts of The King of Town's sheep in The King of Town DVD. He's mostly orange all over, with an oval head covered by a large welding mask, obscuring all of his features, including his eyes. He also wears a dark grey apron. The Blacksmith's body is roughly hourglass shaped, with flipper like arms, similar to Bubs's, and no visible feet.
After a lengthy absence from the Homestar Runner universe, he eventually reappeared as the drummer of the band "All the King's Men!", who performed during a senior prom. He later appeared in the movies as the maraca player in the King's mariachi band. In The King of Town's Very Own Quite Popular Cartoon Show, The Blacksmith tried to remove The Poopsmith's stench by spraying him with perfume, but the perfume cloud died before it reached him. In Somber Vacation, he lent Strong Sad his mask and apron to so he could go on the beach.
Strong Bad seems to be fond of The Blacksmith, as he admits that he likes him in the commentary for The King of Town DVD. He also praises The Blacksmith in the DVD Commentary for KOT'S VOQPCS!