Who could be potential rivals for a Genjutsu Master Naruto in fanfictions?

Sasuke could be a major rival. Since Sasuke also has strong fire - based abilities, he might see Naruto's growth as a Katon master as a challenge to his own skills. Another potential rival could be a new character introduced in the fanfiction, a prodigy from another village who is also focused on mastering Katon. There could also be older, more experienced ninja within the Leaf Village who might initially doubt Naruto's ability to be a true Katon master and thus become rivals in a sense as they test his skills.

Sasuke could be a rival. He's always been highly skilled and competitive. His Sharingan could potentially see through some of the henge master's henges, creating a constant challenge for the henge master to come up with more advanced henges.

Well, 'Genjutsu Master Naruto: The Ascent' is quite interesting. It details Naruto's exploration of different genjutsu techniques, some of which are his own creations. He uses his newfound genjutsu skills not just in battles but also to resolve conflicts in a more peaceful way. There's also a fanfic called 'Shadow of the Genjutsu Master' which focuses on Naruto's adventures as he masters genjutsu while facing various opponents who also specialize in genjutsu.

Another great one is 'Master of Genjutsu: Naruto's New Path'. In this fanfic, the character discovers new forms of genjutsu and uses them to change the course of the Naruto universe. They train with different characters to enhance their genjutsu skills, and it shows how genjutsu can be a powerful tool in the world of Naruto.

Sasuke could be a potential rival. He is highly talented and always striving to be stronger. His determination and different fighting style would make for an interesting contrast to the Nara prodigy.

Potential allies could be his friends like Sasuke. Sasuke, with his sharingan and combat skills, could team up with Naruto in battles against those who fear Naruto's newfound genjutsu power. Enemies might include Orochimaru. Orochimaru is always interested in powerful abilities and would likely see Naruto as a threat to his plans.

Sasuke could be a rival in this fanfiction. Sasuke has always been strong in fire - based jutsu himself. He might see Naruto's claim as the master of fire as a challenge and want to prove his own superiority. Another could be some of the members from other ninja villages who have also mastered powerful fire techniques. For example, a ninja from the Hidden Rock Village who has a unique and powerful fire - based kekkei genkai.

Shisui Uchiha is often a popular character as a genjutsu specialist in fanfictions. His Sharingan - based genjutsu abilities are really powerful and fanfiction writers love to explore different scenarios with him.

Itachi Uchiha is also very common. Fanfictions might expand on his already formidable genjutsu skills. He could be shown teaching other characters his genjutsu techniques or using his Tsukuyomi in new and unexpected ways to defeat enemies.

Another potential rival could be a young prodigy named Lily. She has a diverse team of Pokemon that she has trained from a very young age. Lily is very confident in her abilities and constantly tries to outdo Phoebe in battles. She might also have some unique training methods that Phoebe has to figure out in order to defeat her.