Better to live hundred years as a millionaire, than one week in poverty!

Otto Grunf is a naturalized German-born inventor. He is a former Luftstreitkräfte mechanic who fought in the First World War, and he defected from the German army after his mechanical incompetence caused the airplane of the Red Baron to crash. He moved to America and changed his last name from Grunt to Grunf to avoid detection, and is mentioned to also serve in Second World War. He serves as the inventor, fabricator and the mechanic of the TNT group. Running gag in the series is his incompetence: he usually designs various Rube Goldberg machines that end up in failure, fails to properly service or change the vehicles or weaponry (driving a 1910s era car that usually explodes while attempting to start it or brandishing an 1880s revolver), or invents things that already exist (he claims to have invented the skateboard, which he named Skate-Grunf). Despite his heroic-like behavior and staunch belief in bravery (as seen by quotes stamped on his T-shirts), he is a very cowardly man, constantly running from danger. He usually dresses in a World War I-era flying ace uniform with goggles. He is very loyal and devoted to Number One and never is on his odds. His job is usually to drive Number One around New York (in other words, push his wheelchair around).