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Siegfried was an airport manager.
He is a Caucasian male with brown hair.
He was greedy and callous but like most other villains outside their costumes, he was friendly when he initially met Mystery Inc. and the Stooges. He also had no problem putting others in great danger. Siegfried was also very intelligent and tech-savvy as well as a very experienced pilot.
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He dressed up as the Ghost of the Red Baron to ruin the crops after discovering that the county was planning to buy the farmland and airport runway to expand it into a jetfield. He poisoned the crops so he could buy the farms and runway dirt cheap and sell them back to the county for a big profit.