Dr. Von Goosewing is a mad scientist and vampire hunter, a spoof of Abraham Van Helsing. He is a goose that speaks in a German accent. Von Goosewing wears an outfit not unlike that of Sherlock Holmes, with a pair of spats. He often flies adirigible with "VG" on it.
He pursues Count Duckula relentlessly, never able to comprehend that Duckula is actually completely harmless. When he's not inventing some new machine with which to hunt vampires, he relies on an old fashioned blunderbuss, which is loaded with a wooden stake (although, curiously, it will sometimes actually fire laser beams).
He is a terrible scientist, often getting maimed by his own crackpot inventions. He is supremely unobservant, and often bumps into Duckula and converses with him for several minutes without realising to whom he is speaking.
Von Goosewing appears to have an assistant named Heinrich (who never appears on screen, yet some evidence of his existence appears, such as an uneaten sandwich in the episode "The Incredible Shrinking Duck"). Von Goosewing often calls for Heinrich, and often blames his failures on him. In fact, "Heinrich" seems to be just a figment of Von Goosewing's imagination, an imaginary friend. However, the comic book version of the characters by Marvel reveal that Heinrich is actually his former assistant who is always complaining about his paltry wages. Von Goosewing mentions that Heinrich threatened to resign, but is still with him. Apparently, Heinrich quit, but his former employer failed to realise it.
The Marvel comic books based on the show also add a supporting character: his niece Vanna, on whom Duckula has a crush. This affection is reciprocated and the two have a romance during the comic's run, much to Von Goosewing's chagrin. Goosewing pursues Duckula with greater fervour as he seeks to "protect" his niece from him.