Conway, also known as Conway the Contaminationist, is a revolting pilot who claims to have discovered the means to a better, longer life. His only central appearance was in his eponymous episode.
Conway appears to be a very old man, as stated by himself, about 193 years old. His eyes are very bulbous and his skin is a greyish green (possibly caked on mud) with green bulbs all over it, skinny limbs and large head. He doesn't seem to have teeth anymore and his tongue is a lemon green. He wears a tattered aviator coat with a fur collar and sleeves and a pink scarf as tattered as the coat, along with black pants and black shoes. Whenever he talks, small clouds of dust come out of his mouth. Despite claiming to be a man, it's more likely Conway is actually an alien disguising as a human, due to his bizarre appearance.
Conway is an antagonist that doesn't actually mean any harm, in fact, he wants to make people's lives better. He believes surrounding oneself in filth and grime is actually beneficial to the health, which may or may not be true as a jar of putrid sludge revives him like smelling salt and he claims to be 193 years old, but Eustace and Muriel become emaciated and weak when their lives become disgusting. He can pilot a plane, which he uses to advertise his way of life.
Conway is a pilot, and from his plane he promotes the lifestyle of filth. While dropping flyers and writing in the sky promoting his motto "Live Longer Live Better" Conway loses control of his plane and crashes into the Bagges' windmill. Courage brings Conway inside, there he asks Muriel to give him sludge. Muriel and Courage reluctantly comply and feed Conway sludge from gutters and Eustace's feet. Afterwards, Conway insists that years of living in trash and grime has promoted his long life and good health. However, when he imposes this on the Bagges, they get sicker and sicker by the day, until Courage has enough and builds a giant vacuum cleaner from the wreckage of Conway's plane and vacuums both him and his beloved filth into a balloon that served as vacuum bag. Conway is happy in his new home, and never bothers the Bagges again.