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7 MCU Villains Who Define Their Heroes

The Marvel Cinematic Universe has many great heroes and villains, and their stories are often intrinsically connected. Since the franchise’s very beginning, the MCU has been defined by its stories of good versus evil, adapted from the pages of Marvel Comics. The MCU has brought many iconic heroes to life on the big and small screens alike, but no superhero story is complete without a worthy antagonist for the hero to face. The movies and TV shows of the MCU have established many excellent Marvel villains, and their stories regularly intertwine with those of the franchise’s heroes, often connecting their origins in a way that forever links the opposing characters.

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Having villains that perfectly complement the hero they fight is an established trope in the superhero genre, but the best examples actually connect the villain to the hero’s origins. Some of the best MCU villains are those that have completely defined the stories of their enemies, either by playing a key role in their respective backstories or by having a huge impact on their character in some other way. It’s a feat that the MCU has managed multiple times, with some of the franchise’s best heroes being completely defined by their villains.

7) Billy Russo

Ben Barnes as Billy Russo in The Punisher

The MCU often makes changes to Marvel villains from the comics, but few made a character as impactful to a hero’s story as those made to the villain Jigsaw for The Punisher TV show. The MCU’s Billy Russo is a former ally of Frank Castle, with the pair becoming incredibly close while serving as US Marines. Russo’s decision to engage in illegal activity ultimately led to his involvement in the murder of Frank Castle’s family, precipitating his transformation into the Punisher. A reflection of what the Punisher might have been if he didn’t have such an enduring love for his family, Jigsaw’s story effectively defines the Punisher in the MCU.

6) Kilgrave

Kilgrave is sometimes considered one of the most iconic and terrifying MCU villains, thanks in part to David Tennant’s unforgettable portrayal of the Purple Man. His manipulation of Jessica Jones effectively shaped her entire story, causing her deep-seated guilt over acts he forced her to commit and immense trauma over the time spent in his clutches. While Kilgrave wasn’t connected to the origins of Jessica Jones’ powers, he remains perhaps the most important character in her entire MCU backstory.

5) Ego

One of the Marvel villains the MCU made better than the comics, Ego the Living Planet’s story was heavily reworked to secure his place in the live-action franchise. A self-proclaimed Celestial, the MCU’s Ego is Star-Lord’s biological father, but he’s also responsible for the death of his mother, and, by extension, his Ravager upbringing. Ego’s story is one that completely shaped Star-Lord’s life, taking him from a potentially normal existence on Earth to a full-scale cosmic hero in the process.

4) The High Evolutionary

Guardians of the Galaxy Vol. 3 established the traumatic MCU origins of Rocket Raccoon, and made the High Evolutionary the villain who ultimately defined Rocket’s story. The High Evolutionary’s experimentation didn’t just grant Rocket his remarkable intelligence, but the villain’s treatment of the future Guardian and his friends shaped Rocket’s entire character within the franchise. Rocket’s struggles with his identity and relationships with others all stem from the High Evolutionary’s horrific treatment, connecting their stories in a profound and upsetting manner.

3) The Winter Soldier

Bucky Barnes with Captain America's shield in The Winter Soldier

Of all the MCU villains who turned into heroes, Bucky Barnes is one of the most beloved. His time as the Winter Soldier did more than just define him as a villain, but it also shaped both his own hero story and that of Steve Rogers. Bucky’s heroism is directly connected to his profound guilt over his time as the Winter Soldier, while the trajectory of Steve Rogers’ story changes completely after learning of Bucky’s survival. As a result, Bucky’s stint as an MCU villain has come to define the stories of multiple heroes within the franchise.

2) Loki

Tom Hiddleston as Loki in The Avengers

Loki’s story has seen him go from a charismatic villain to one of the MCU’s most beloved characters, marking an incredible arc. His status as a villain ultimately defined Thor’s story in the MCU, though, as it was Loki’s interference that forced Thor to reevaluate his reckless bravado and embrace his role as a true hero. Were it not for Loki’s early villainous antics, Thor would never have become the hero who has shaped multiple MCU stories.

1) Wilson Fisk

Vincent D'Onofrio as Wilson Fisk on Daredevil Born Again

Kingpin is one of the best MCU villains currently active within the franchise, and his story defines that of his arch-nemesis, Daredevil. While Wilson Fisk traditionally serves as an antagonist to multiple Marvel heroes, his connection to Daredevil, particularly within the MCU, hopelessly entangles their respective stories. Kingpin’s repeated attempts to discredit, thwart, and kill Daredevil have led to heavy losses for both characters, and their stories have now become all but inextricable in the context of the MCU.

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