She could be a sidekick. Metal Bat often goes into battles alone, but having a female sidekick could change his approach. She could provide support in different ways, such as using her unique abilities to gather information about enemies or heal Metal Bat when he is injured during a fight.
She could be a love interest. This would add a new emotional dimension to Metal Bat's character. He would have someone to care about other than just fighting villains. For example, she could be in danger during a monster attack, and Metal Bat would be extra motivated to save her.
Fanfiction explores Metal Bat's character by delving into his emotions. For instance, his anger, which is a big part of his fighting style, can be explored in more detail. We might see what really makes him tick and what can push him over the edge. His loyalty to his sister is also a key aspect. Fanfictions can show how this loyalty affects his decisions as a hero, like whether he'll abandon a mission to protect her.
One possible storyline could be that the original female character is a new hero in the One Punch Man universe. She teams up with Metal Bat on a mission. They start off not getting along well due to their different fighting styles. Metal Bat is more brute force while she might be more strategic. But as they face tougher and tougher enemies, they learn to combine their skills and eventually become good friends or even more.
One possible fanfiction could be about the Metal Bat facing an extremely powerful and unknown monster in the One Punch Man universe. He could struggle in the fight at first, using his bat with all his might. But as the battle progresses, he discovers a new level of strength within himself, inspired by the other heroes he has seen in action.
To create an engaging Metal Bat OC in One Punch Man fanfiction, first, give them a unique backstory. Maybe they have a special reason for picking up the bat as their weapon. For example, it could be a family heirloom with a hidden power.
One popular storyline in Metal Bat fanfiction could be his adventures outside of the main One Punch Man plot. For example, he might go on a solo mission to a far - off land to fight a new and powerful monster. Another could be his interactions with other heroes in a more in - depth way, like training sessions with Genos or team - up missions with Mumen Rider. And sometimes, fanfictions explore his family life, like how he balances his hero work with taking care of his sister.
The plot could be Metal Bat going on a quest to find a special metal to upgrade his bat. Along the way, he encounters various monsters and other heroes. He might have to compete with other heroes who also want the special metal for their own reasons.
Another role could be as an antagonist. Maybe they have a different view on how heroes should operate and end up causing trouble for the other heroes. This would create conflict and drive the plot of the fanfiction forward.
The self - insert character could fit into the One Punch Man world by starting as an ordinary civilian. Maybe they witness Saitama's heroics and get inspired to become a hero themselves. They could then go through a series of comical and difficult training regimens, similar to what some of the other heroes in the show have experienced. They might also have to deal with the fact that in this world, there are monsters much stronger than they initially thought, and they need to constantly improve to keep up.
A character could be a hair - stylist in the One Punch Man universe who is obsessed with getting to style Saitama's hair. He or she could follow Saitama around, much to his annoyance, offering different hair - styling ideas and thinking that it would enhance Saitama's already overpowered status.
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.