One of the most OP characters is Superman from DC Comics. He has super strength, can fly, has heat vision, and is nearly invulnerable. His powers make him extremely difficult to defeat in most situations.
Saitama from One - Punch Man is another example. As his name implies, he can defeat any opponent with just one punch. His strength is so overwhelming that he has become bored with fighting because there are no real challenges for him. Despite his simple appearance and unassuming personality, his power level is off the charts compared to most characters in the fictional world of One - Punch Man.
One of the most OP powers in fiction is omnipotence. Characters with this power can do absolutely anything without limitations. For example, in some religious and mythological stories, the supreme deities are often depicted as omnipotent. They can create and destroy worlds at will, manipulate time and space, and control all aspects of existence.
Another popular type of character is the mentor. This could be an older, more experienced gamer who helps the op fighter improve their skills. They often have a wealth of knowledge about the game's secrets and mechanics, and their relationship with the main character can be a key part of the story, like teaching the op fighter how to unlock hidden powers or strategies.
Powerful abilities are a key factor. For instance, characters like Doctor Strange in the Marvel universe possess magical powers that can manipulate time, space, and reality. This gives him an edge over many opponents. Another aspect is near - invulnerability. Characters such as Wolverine can heal from almost any wound quickly, making them hard to kill.
Podrick Payne is often overlooked. He has a lot of potential in a fanfiction. He could be revealed to have a hidden talent for strategy, having learned from all the great knights he has served. And Bronn, while not completely ignored, could be further explored. He could find himself in a situation where he has to choose between his love for gold and loyalty to a cause that he actually believes in, like helping the common people of King's Landing.
Goku from 'Dragon Ball' is also extremely powerful. His ability to continuously increase his power level through training and various transformations is remarkable. He can harness the power of the Super Saiyan forms, which give him incredible strength, speed, and energy projection capabilities. In his Ultra Instinct form, he can react and fight without even thinking, making him a formidable opponent.
Akeno could be a central character as well. Her unique powers in 'Highschool DxD' could be further developed with the addition of 'Fate' and 'gamer' elements. For instance, she could gain new skills or abilities through the 'gamer' system and use them in 'Fate' - like battles, making her a key figure in the fanfiction.
Well, there's Frodo Baggins from 'The Lord of the Rings'. He's an ordinary hobbit thrust into an extraordinary adventure to save Middle - earth from the evil Sauron. His journey of carrying the One Ring is a classic in fiction. Alice from 'Alice's Adventures in Wonderland' is also very iconic. Her strange journey down the rabbit hole into a world of talking animals and strange rules has fascinated readers for generations. And let's not forget Dracula. He's the quintessential vampire, representing the dark and mysterious allure of the undead in literature.
Jay Gatsby from 'The Great Gatsby' is also very tragic. He devotes his entire life to winning back Daisy, only to be ultimately rejected. His pursuit of the American Dream through wealth and love ends in his untimely death, leaving him a lonely figure.
Another very famous fictional character is Harry Potter. J.K. Rowling's creation, Harry is a young wizard who discovers his magical heritage and battles the dark wizard Voldemort. The series of books about him has a huge global following and has also been made into successful movies.
One of the most powerful characters is Superman. He has super strength, can fly, and has heat vision. He can move planets and withstand extreme forces.