Who could be a potential main character in 'Reborn in One Punch Man fanfiction'?

Another possibility is that the main antagonist is a corrupted hero. This hero, who has turned to the dark side, sees Kombu Infinity as a threat to his new - found power and plans. He uses his knowledge of the hero association and his own powers to try and eliminate Kombu Infinity, all while trying to keep his true identity a secret from the other heroes.

Mumen Rider could be an interesting main character choice. His unwavering sense of justice and his determination despite being a relatively weak hero could be the focus. In a daily life fanfiction, we could see how he trains, his interactions with civilians, and how he looks up to heroes like Saitama even though he may not be on the same power level.

There's a possibility that it's a completely new entity from another dimension or realm. This character with the 'golden name' enters the One Punch Man world with a mission to save lives. They might have abilities that are far beyond what the regular characters in the One Punch Man universe possess. Their golden name could hold the key to some great power or knowledge that is necessary to save the world from a new and greater threat.

Genos is also a main character. He is a cyborg who becomes Saitama's disciple. He is very powerful but not nearly as strong as Saitama. He is constantly seeking ways to improve his strength and learn from Saitama.

The concept could be expanded by giving the punch different properties. For instance, it could have the ability to nullify an enemy's special powers instead of just knocking them out physically.

One interesting concept could be a character being reborn with a new power set. For example, they might have a unique combination of Saitama's strength and Genos' technological abilities. This could lead to new and exciting battles in the One Punch Man universe.

A powerful and grotesque - looking villain who specifically targets Sweet Mask because of his obsession with beauty could be a great antagonist. This villain could constantly taunt Sweet Mask about his vanity and try to shatter his perfect image.

How about a group of aliens who have heard about the One Punch Man tournament and are curious to see the power levels on Earth? They come with their own set of powers, like the ability to transform their bodies into different elements. One of them might be able to turn into water, making it difficult for the heroes to land a solid punch. These aliens add a whole new level of chaos and excitement to the tournament as the heroes have to figure out how to fight against such strange and powerful opponents.

Deku would likely become more confident in his abilities. In the One Punch Man universe, he'd see Saitama's nonchalant attitude towards fighting and might start to adopt a similar mindset. He'd also have to adapt to the different types of villains. Since One Punch Man villains are often very strange and powerful in unique ways, Deku would need to be more creative with his strategies.

Fred Weasley could also be seen as a ladies' man. He's funny, outgoing, and always up for a good time. Fanfiction could explore how his humorous and mischievous nature draws the girls to him. He might be the type to play pranks on the girls just to get their attention and then charm them with his witty remarks.