Norman Osborn is a fictional character in the Marvel Comics universe, primarily known as the alter ego of the supervillain Green Goblin. He is a wealthy industrialist and the head of Oscorp, a company involved in advanced technology and military research. Osborn's character often embodies themes of power, corruption, and the duality of human nature. As the Green Goblin, Osborn becomes one of the most formidable adversaries of Spider-Man. His transformation is fueled by a serum that enhances his physical abilities but also drives him to madness. This duality makes him a complex character, often oscillating between his roles as a businessman and a villain.