Tony Stark is Iron Man in the Marvel Cinematic Universe, an industrialist, genius inventor, and playboy who becomes a superhero after being kidnapped and forced to build a deadly weapon. He is charismatic, flamboyant, and a master strategist, balancing his life as a billionaire and as a hero. He has a penchant for high-tech gadgets, loves mechanical engineering, and possesses a wry sense of humor. Tony struggles with hubris and the consequences of his past actions, often questioning his role as a savior. He shares a complex relationship with his father, mentor figure Obadiah Stane, and best friend James Rhodes. His arch-nemesis is the tenacious but mad scientist, the Mandarin. Tony Stark is known for his significant role in founding the Avengers and his dynamic leadership qualities that define both the team and his personal quest.

Darth Vader is a male, middle-aged main character from the Star Wars franchise. Known for his imposing physical presence and intimidating, mechanical respirator-aided voice, Vader is feared as the ruthless commander of the Galactic Empire's forces. His character traits include a strong sense of control, discipline, and authority, tempered with a complex emotional undercurrent borne from his history as a Jedi Knight turned Sith Lord. A dark leader respected for his martial prowess and strategic acumen, Vader commands an aura of power and fear. He has a troubled relationship with his son, Luke Skywalker, whom he unknowingly tries to bring to the dark side. His adversary, Obi-Wan Kenobi, serves as his nemesis and a reminder of his past. Vader's primary weapon is a lightsaber, a symbol of his dual identity and a tool he expertly wields in battles both physical and internal.