He is Spider-Man's archenemy and his one foe who keeps haunting him even after death. After being exposed to the Goblin Serum, he develops a split personality that drives him to become a supervillain bent on securing his company and more power, becoming focused on destroying Spider-Man and everything he cares about.
He is the founder and CEO of Oscorp and the father of Peter Parker's best friend Harry. He first appeared as the main antagonist of Spider-Man, the posthumous overarching antagonist of both Spider-Man 2 and Spider-Man 3 and will return in some capacity in the upcoming Marvel Cinematic Universe film Spider-Man: No Way Home. Norman Osborn, also better known as the Green Goblin, is the main antagonist of the Spider-Man film trilogy.