Doctor Octopus (Spider-Man Films)

Otto Gunther Octavius, later called Doctor Octopus, is the main antagonist of the 2004 superhero film Spider-Man 2, the second installment of Sam Raimi's Spider-Man trilogy, and a supporting character in the 2021 Marvel Cinematic Universe film Spider-Man: No Way Home.
He was an enthusiastic scientist and friend of Peter Parker who later became possessed by his own malevolent mechanical arms after an experiment with his fusion reactor funded by Peter's best friend, Harry Osborn, went horribly wrong. From then onwards, Otto turned into a dangerous supervillain and the former second archenemy of Spider-Man.