Naruto himself is obviously very popular as it's his fanfiction. But Sasuke also often plays a big role. Fans love to explore their relationship further in fan - made stories.
Naruto and Mega Man themselves are often the most popular crossover characters. Since they are the main protagonists of their respective series, fans love to see how they interact. Another popular one could be Rockman (Mega Man) interacting with Sasuke. The contrast between Rockman's more robotic and logical nature and Sasuke's brooding and power - hungry personality can create some interesting dynamics.
Naruto and Saitama are often paired in fanfiction. Their contrasting personalities, with Naruto's exuberance and Saitama's non -chalance, make for an interesting dynamic. Another popular pair is Sasuke and Genos. The brooding nature of Sasuke and the serious, robotic Genos can create some intense storylines.
Naruto himself is always a popular choice. His journey from an outcast to a hero is full of material for fanfiction. Sasuke is also very popular. His brooding nature and his search for power make for interesting stories. Kakashi is another one. His mysterious past and his cool ninja skills are great to write about.
Mary Jane is also very popular. Fans love to write about her relationship with Peter, whether it's the ups and downs or how she deals with Peter's double life. In some fanfictions, she might even have a more active role, like helping Spider Man in some way.
In Iron Man 2 fanfiction, Tony Stark stands out as the most popular. His charm, intelligence, and superhero persona draw a lot of attention. Pepper Potts comes in second, as she is an important part of Tony's life, both personally and professionally. Writers love to explore their relationship dynamics. Additionally, Ivan Vanko, the villain in Iron Man 2, is also a popular character in fanfiction. His backstory and his vendetta against the Stark family make for interesting storylines.
There are some original characters created by fanfiction writers that have gained popularity. For example, a young girl who has psychic abilities and can sense the Slender Man's presence from a distance. She becomes a key figure in trying to fight against him. These original characters often bring new perspectives and storylines to the fanfiction world of Slender Man.
Tony Stark is definitely one of the most popular. Since he is the main character in the movie and has such a complex personality, he offers a lot of room for fanfiction writers to explore different aspects of him. Pepper Potts is also popular as she is an important part of Tony's life.
Sasuke can be a popular character too. In some fanfictions, he could be in a rivalry with the mask man or even form an unlikely alliance. Kakashi might also be involved as his Sharingan could potentially play a part in unravelling the mystery of the mask man.
Obviously, Spider - Man and Iron Man themselves are extremely popular. They are the main draws as they are the two iconic heroes. But characters like Pepper Potts might also be popular as she could be involved in stories related to Iron Man's actions in the fanfiction.
Venom is quite popular in Spider - Man fanfiction. His complex relationship with Spider - Man can be explored in many ways. He can be a villain, an anti - hero, or even an ally in some really creative fanfictions. Another popular one is Gwen Stacy. Fans love to write about her and Peter's relationship, especially in alternate timelines.