An NPC in Terraria, first debuting in late 2011 (1.1.0). A Goblin-like humanoid person, who is implied to be not very liked from the enemy goblins the Player Character (Terraria) fought in the Goblin Invasion. Has a relationship with the Mechanic (Terraria). He can reforge the player's weapons and Tools — and to his chagrin the fandom makes fun of how much of a money sink his reforging service is.
Once freed in the Underground, he can move into a house of his own.