MS-3 was an invention of Smalding Smiles, created to assist him in maintaining the Mecha-Smiles. Though Mecha-Smiles was designed first, MS-3 was the first time Smiles met with success in attempting to simulate intelligence in his robotic creations. MS-3 remained in constant service at the Smixion military base housing the Mecha-Smiles from its creation up until the Great Smilocide. He was programmed to be particularly facile at preparing chilled beverages, which he offers assiduously. It is friends with Jeff Smork and Klurbin the guard.