It could be a new genin who has always felt different from the other ninja in their class. This character discovers their kitsune summoning ability during a training exercise and then embarks on a journey to master it.
Perhaps an older, more experienced ninja who has long hidden their kitsune summoning ability out of fear. But when a great danger looms over the village, they decide to embrace their power and become the main character in the fanfiction. They could have a complex backstory involving past traumas related to their summoning.
It could be Naruto himself. Imagine Naruto with the power to summon kaiju. He would be even more of a force to be reckoned with. His usual knack for making friends could extend to the kaiju he summons, and he could use their power in his never - ending quest to protect the Hidden Leaf Village and bring peace to the ninja world.
The main character could be a young orphan who discovers they have the power of a summoner. They grow up in the Naruto world but have always felt out of place. One day, they accidentally summon a pony and realize they have a connection to another world. This character would be on a journey to discover their true identity and the full extent of their summoning powers.
Another option could be a character who was once a villain or a criminal but is given a second chance through the power of chimera summoning. They use this new ability to redeem themselves and fight for a different cause, which would make for a very interesting character arc.
It could be a young genin who has always been interested in spiders and discovers their arachnid summoning ability. Maybe they were orphaned and had to rely on their own wits and new - found power to survive in the ninja world.
Obviously, Naruto would be one of the main characters. He's the protagonist of the Naruto series and would be the main link to the ninja world in this crossover. Another could be a young Kitsune, maybe one that's just coming of age in the Kitsune world. Their paths cross, and they have to learn to work together.
Maybe another kitsune who has gone bad. In the fanfiction world, there could be a rogue kitsune who sees Naruto as a threat. This antagonist kitsune might be jealous of Naruto's power or his connection to the human world. They could try to undermine Naruto's attempts to protect the village or his friends.
It could be an evil shinobi who wants to capture the Kitsune Anbu for their unique powers. Maybe they want to use those powers to take over the Hidden Leaf Village. Another option is a rogue Anbu member who has turned against the village and sees the Kitsune Anbu as a threat to their own plans.
It could be another powerful kitsune who wants to use the assassin for their own evil plans. This other kitsune might be jealous of the assassin's skills and wants to control them.
A possible plot for a 'Naruto Kitsune Summoner' fanfiction is that the main character, a kitsune summoner, discovers that their summoning ability is linked to a long - forgotten prophecy. The kitsune they summon are the key to either saving or destroying the ninja world. Along the way, they meet other summoners and have to decide whether to trust them or not, while also exploring the deep cultural and magical aspects of the kitsune summoning.
It could be another summoner who is jealous of the panther summoner's power. This antagonist summons a powerful and dangerous beast, like a giant snake, to constantly challenge the panther summoner and try to steal their power or reputation.