Otto Octavius is the scientist and supervillain known as Doctor Octopus, who later becomes the Superior Spider-Man when his mind takes over Peter Parker's body. In this role, he tries to act as a more ruthless, efficient Spider-Man, using Peter's identity and powers while claiming to improve on the original hero. The character is central to a major Spider-Man storyline, exploring themes of identity, redemption, ego, and what it means to be a hero.