One possible plot could be that Naruto, while on a strange mission, gets transported to Elsa's world. Naruto, being his adventurous self, tries to understand Elsa's powers and her fear of them. He might encourage her to face her fears in a more direct way, like he does with his own challenges in the ninja world. And they could team up to protect Elsa's kingdom from some unknown threat.
A possible plot might be that there is a prophecy in both the Naruto universe and the Frozen universe. It says that a union between a powerful shinobi and an ice queen will save both worlds from a great darkness. Naruto and Elsa are brought together by this prophecy. At first, they struggle to understand each other's cultures and powers. However, as they spend more time together, they develop a deep bond. They use their combined powers of ninjutsu and ice magic to fight against the approaching darkness that threatens to engulf their respective worlds.
In a 'naruto x elsa frozen fanfic', it could start with Naruto being lost and finding himself in Arendelle. Elsa senses his strange energy. At first, there is conflict as the people of Arendelle are scared of Naruto. But Naruto shows his good heart. Elsa and Naruto then start to explore each other's worlds in a spiritual sense. They find similarities in their isolation. As they bond, a new enemy emerges, a sorcerer who wants to control both Naruto's ninjutsu and Elsa's ice magic. Together, they fight against this threat, with Naruto's courage and Elsa's grace.
Perhaps an evil ice mage from the Frozen world who has heard of Naruto's power and wants to steal his chakra to become all - powerful. This mage could be jealous of Elsa's natural ice powers and sees Naruto as a means to an end to get rid of her as well.
It's really hard to say. It could depend on the situation. In a battle situation, Naruto's combat skills might make him seem more dominant. But when it comes to matters in Elsa's kingdom or dealing with her people, Elsa would be the more dominant one. Also, if they work together, they might share the dominance equally, each bringing their own strengths to the table and relying on each other in different ways.
It could be a character who has the power to absorb chakra and ice magic. Let's call him Zarak. Zarak wants to use the combined power of Naruto's world and Elsa's world to become invincible. He starts by causing chaos in both worlds, making the Hidden Leaf Village believe that Elsa is a threat and making Elsa think that Naruto and his friends are there to capture her. This way, he can keep them apart and continue his evil plan.
A common theme is the clash of two different worlds. Elsa comes from a world of magic and royalty, while Naruto is from a world of ninjas and shinobi clans. So, the fanfictions often explore how these two very different cultures interact.
One major problem is that it's a non - canon and rather strange combination. Naruto is from a ninja - themed anime and Elsa is from a Disney princess movie. Mixing them in a 'lemon' context is disrespectful to the original concepts of both.
One common theme is the fish - out - of - water experience. Elsa, coming from her own world in 'Frozen', suddenly finds herself in the Naruto universe, which is full of ninjas, jutsus, and a very different culture. Naruto, on the other hand, has to deal with someone who has such a different power set from what he's used to in his world.
Many 'Elsa and Naruto' fanfictions also deal with the idea of isolation. Elsa has her own isolation in her story due to her powers, and Naruto was also somewhat isolated as a child. Fanfictions might explore how they can understand each other's feelings of loneliness and help each other overcome it.