Typically, Ben Tennyson is the main focus in 'ben 10 muscle growth fanfic'. However, other characters like Gwen and Grandpa Max can also be important. Gwen might react to Ben's muscle growth, perhaps with a mix of surprise and concern. Grandpa Max could offer his wisdom or help Ben deal with any unexpected consequences of his new physical state.
In 'ben 10 muscle growth fanfic', Ben Tennyson is the key character without a doubt. But don't forget about his enemies. Some fanfics might involve his adversaries noticing his muscle growth and adjusting their strategies accordingly. For example, Vilgax might see Ben as a more formidable opponent and plan more devious attacks. And then there are Ben's friends from school or other allies who could also play a role in the story, either supporting or being curious about his new look.
Ben Tennyson is almost always the main character in 'ben 10 muscle growth fanfic' since it's based on the Ben 10 series. His transformation and the resulting muscle growth are central to the story. Sometimes, his alien forms might also be involved in a different way because of the muscle growth concept.
Definitely Ben Tennyson. He's the center of the Ben 10 universe, so it's no surprise he's often in body switch fanfics. When his body is switched, it's not just about the physical change but also about how he'll use his alien forms in a different body. Gwen is also commonly involved. She has her own set of skills and a distinct personality, which can be a great contrast when she's in someone else's body. Then there are the various alien characters from the Omnitrix. If they end up in Ben's body or vice versa, it can create all sorts of chaos and interesting plotlines.
Bella herself can also be part of these fanfictions in terms of how she reacts to the muscle growth of the male characters. Her perspective, whether it's admiration, fear, or something else, can add depth to the story. Also, sometimes in unique fanfictions, she might even have some form of power - related muscle growth herself.
Obviously Naruto himself is often the main character as it's about his muscle growth. Sasuke can also be involved, perhaps as a rival who is both impressed and a bit envious of Naruto's new - found physical power.
One interesting aspect could be the unique character development. In a 'ben 10 muscle growth fanfic', we might see Ben Tennyson's character evolving in a different way due to the muscle growth concept. Maybe he becomes more confident or faces new challenges. Another aspect is the creativity in the plot. Writers can come up with various scenarios where the muscle growth affects his battles or relationships with other characters.
Ben is obviously the main character as it's a 'ben 10' related fanfic. His various alien forms are also important characters in a sense. For example, Upgrade might be involved if the story has to do with his feet being able to attach to and control machinery in a unique way related to his feet. Gwen could also be a part of the story, perhaps helping Ben understand some strange phenomenon related to his alien feet forms.
Obviously, Naruto is often the main character in 'Naruto hyper muscle fanfic' as the concept revolves around him having hyper muscles. His friends like Sasuke and Sakura are also likely to be involved. Sasuke might be initially jealous of Naruto's new power or might be inspired to train harder. Sakura could be the one to help Naruto understand and control his new strength from a medical ninja's perspective.
The Cullens are often involved too. Edward, for example, as Alice is part of the Cullen family. Their interactions can be explored in different ways in fanfic, perhaps showing a different side of their family dynamic.
Naruto is almost always the main character in 'Naruto Foodgasm Fanfic'. His love for food is well - known in the original series, so it makes sense. Sometimes his friends like Choji, who also loves food, are involved too.
Obviously, Tsuna is the main character. But often, his friends like Gokudera and Yamamoto are also involved. Since Tsuna's anger usually has something to do with his relationships with them, they play important roles in the fanfic. For example, they might be the ones who trigger his anger or the ones who have to deal with the consequences of his anger.
In addition to the main Naruto crew, characters like Jiraiya can be important in 'prodigious naruto fanfic'. He was Naruto's mentor, so in fanfics that explore Naruto's growth further, Jiraiya is likely to be there. Also, villains like Orochimaru or Pain can be central in some fanfics, especially those that deal with Naruto facing greater threats or trying to redeem the villains.