Perhaps in this fanfiction, Naruto is on a quest for a powerful weapon to defeat a new and extremely powerful enemy in his own world. He somehow stumbles upon a portal that leads him to Poseidon. Poseidon, seeing Naruto's determination and good heart, decides to let him borrow the Trident for a while. Naruto then has to learn how to control the Trident's power, which is completely different from his chakra. He trains with some sea - based creatures and eventually returns to his world to face the enemy, using the Trident's unique abilities to gain the upper hand.
Well, it could be that Poseidon's Trident has been stolen and Naruto is called upon to find it. He teams up with some of Poseidon's loyal servants or maybe even a mermaid or two. Along the way, he uses his ninja skills to track down the thieves. When he finally finds the Trident, he has to face the main villain who stole it. Naruto might use his Rasengan in combination with the power of the Trident to defeat the bad guy and return the Trident to Poseidon.
Naruto might initially struggle with the power of the Trident. Since he's used to his chakra system, the magic or divine power of the Trident would be something new. He could start by accidentally activating some of its basic powers, like creating small whirlpools or summoning small sea creatures. As he spends more time with it, he would learn to control it better, maybe even combining his own ninja techniques with the Trident's power, like using the Rasengan while channeling the Trident's energy through it.
Well, if Naruto had Poseidon's trident, it would completely change the power dynamics in the Naruto universe. Firstly, the trident is a symbol of great power in Greek mythology. Naruto could use it to control water in ways that are unimaginable in the Naruto world. He might be able to create massive tidal waves to defend Konoha or use water to enhance his already existing jutsus. Also, it could potentially give him an edge in battles against powerful foes like Madara or Kaguya. With the trident, Naruto could become an even greater protector of his village and the entire ninja world.
The trident might represent Percy's growth. It could mean that he has reached a new level in his development as a demigod, and Poseidon is acknowledging that with this gift. It's like a rite of passage in a way.
One possible plot could be that Naruto, as the daughter of Poseidon, discovers her true heritage in a world where ninjas and gods co - exist. She might struggle to balance her ninja training with her new - found godly powers. For example, she could learn to control water in ways that are far beyond normal ninja water jutsu, like creating massive tidal waves or summoning sea creatures to aid her in battle.
Well, it could be about Naruto having special powers related to Poseidon. Maybe he can control water in ways that are different from his normal ninja skills. He might also have a connection to the sea or underwater realms.
Perhaps there is a crossover event in the fanfiction. Some sort of magic or powerful artifact causes the Naruto universe and the world of Poseidon to collide. Naruto, being the adventurous and powerful character he is, gets involved in this chaos and ends up having a special relationship with Poseidon, either as an ally or having to face him as an adversary.
Naruto could potentially gain allies among the water - based creatures in the Naruto universe. With the trident, he could communicate or form a bond with them. However, he might also draw the ire of those who oppose any form of outside power or interference. There could be ninja clans or groups that believe Naruto having a weapon from another mythology is against the natural order of the ninja world. This could lead to new enemies who would stop at nothing to get rid of Naruto and the trident.
One possibility is that Percy uses the trident to explore uncharted areas of the ocean. He discovers ancient underwater ruins that are protected by powerful magic. With the trident, he can navigate through dangerous barriers and uncover secrets about his own heritage and the history of the sea gods.
It might make Percy more confident. With the trident, he has a powerful symbol of his father's support. He could use it to face stronger enemies and gain more respect in the demigod world.
One possible plot could be a story of cooperation. Maybe there is a great threat to the world of the Greek gods, and Athena, with her wisdom, and Poseidon, with his power over the sea, have to work together. They could start off distrusting each other due to their past rivalries, like the competition for Athens. But as they face challenges, they gradually learn to respect and rely on one another's strengths.