Definitely Naruto and Sasuke are up there. But Hinata can be really popular in some Naruto Crisis Fanfiction. Her love for Naruto can be explored in different ways, especially if Naruto is in a real crisis. Also, characters like Itachi can be very popular. Even though he's dead in the original series, in fanfiction, he can be brought back in different scenarios and his complex character can be further explored.
Naruto is often still a very popular character in Naruto Crisis Fanfiction. His growth and development in these new, often more challenging situations is a big draw. Sasuke is also popular as readers are interested in seeing how he fits into the new storylines. Kakashi remains a fan favorite too, as his wisdom and badassery are always great to read about in these fan - created stories.
Rose is a very popular character to feature. Her strong personality and connection to the dragons make her an interesting focus. Writers can explore more of her backstory and her relationship with the dragons in greater depth.
Barry Allen is quite popular. His speedster abilities can create a lot of interesting scenarios in the Crisis on Earth X setting. Writers can explore how his powers work differently on Earth X or how he teams up with alternate versions of himself.
Superman is always a popular choice. His power and moral compass make him a central figure in any Crisis - related story.
Naruto is often very popular. His outgoing personality and determination make him a natural fit for the rockstar world. Fans love to imagine him on stage, rocking out and inspiring the crowd.
Kakuzu is another character that can be popular in these fanfictions. His unique ability to have multiple hearts and his money - loving nature can add a touch of humor or be explored in more serious ways in relation to the Akatsuki's goals and activities.
Naruto himself is often a popular character in such fanfictions. His popularity in the original series makes him a natural focus for new and cybernetic - themed storylines. Sasuke is also quite popular as fans like to explore how his Sharingan could be enhanced with cybernetic elements.
Naruto himself is often a central and very popular character in these fanfictions. Since it's about his rebirth, readers are interested in seeing how his character evolves differently.
In Naruto fanfiction, Sasuke is often very popular. His cool and brooding nature makes for interesting storylines. Naruto himself is also a common focus. In Megaman fanfiction, Megaman and Proto Man are popular. Their heroic personas and their relationship as brothers or comrades are often explored in different ways.
Twilight Sparkle from My Little Pony is also quite popular in these crossovers. Her intelligence and powerful magic make her a great counterpart to Naruto. She can have really interesting interactions with Naruto, whether it's about sharing knowledge or working together in battles.
In 'alchemist naruto fanfiction', Naruto is surely one of the most popular characters. He could be the one to bridge the gap between the ninja world and the world of alchemy. Sakura is also a likely popular character. Her intelligence and medical skills could be developed further in a story with alchemical elements, like using alchemical knowledge to improve her medical ninjutsu. Another popular character could be Itachi. His complex backstory and powerful abilities could be intertwined with alchemist concepts in really interesting ways.