A Percy and Nico fight in fanfiction might be a complex affair. Their respective loyalties could come into play. Percy is loyal to Camp Half - Blood and Nico has his own complex allegiances. They could be fighting because of different ideas about how to deal with a new threat to the demigod world. Percy might think of a more upfront approach using his powers, while Nico could be more inclined towards using his knowledge of the Underworld and the dead to outwit the threat. This difference in approach could lead to a fight between them as they try to impose their methods on each other.
One reason could be jealousy. Maybe Nico is jealous of Percy's popularity at Camp Half - Blood. Another reason might be a difference in their goals. Percy wants to protect the camp and the mortal world in a certain way, and Nico has his own ideas that don't align with Percy's. So, this divergence of interests could lead to a fight.
Another reason might be the stress of their quests. They are constantly under pressure to save the world or their friends. This stress can build up and cause them to lash out at each other. For instance, if a quest isn't going well and they keep hitting dead ends, they might start blaming each other for mistakes made along the way.
Well, one possibility is that Percy uses his powers of water manipulation that he got from Poseidon in unexpected ways. He might create water clones to confuse Poseidon during the fight.
They could fight due to a prophecy. If there's a prophecy that involves one of them being the 'chosen one' and the others think they should be, it would create a lot of tension. For instance, if the prophecy says that only one of them can save the world from a certain doom. Percy, being the main character in many stories, might be assumed by the others to be the one, but Thalia and Nico may believe they have just as much right. Their struggle for that role could lead to a fight. And during the fight, they would use their unique abilities. Percy would call upon the water, Thalia would summon her lightning bolts, and Nico would raise the dead to fight on his behalf.
Well, in such a fanfiction, Percy might show extraordinary combat skills that would impress the gods. Maybe they would be secretly rooting for him or perhaps even interfering in the fight in some unexpected ways.
In a fanfic about Percy and Thalia's fight, it could start because of a misunderstanding. Maybe Thalia thinks Percy is getting too much attention from the gods and she's jealous for the sake of all the half - bloods. Percy, on the other hand, might not understand why Thalia is so hostile all of a sudden.
The reconciliation could happen simply with an apology. Percy might be the first to say he's sorry for being so stubborn during the fight. Annabeth, seeing his sincerity, would forgive him and they would hug it out, realizing their relationship is more important than whatever they were arguing about.
Well, in a fight between Percy Jackson and Jason Grace in a fanfiction, Percy could use his water powers to his advantage. He might create huge waves or even use water to disorient Jason. Jason, on the other hand, would likely call upon the winds and lightning. He could try to strike Percy with lightning bolts while using the wind to keep Percy's water attacks at bay. It would be an epic battle of the elements.
Well, they could be betrayed by someone they trusted deeply, like a fellow demigod. Maybe this person spreads false rumors about them, leading to their isolation within the demigod community. The three of them would then have to struggle to clear their names and find out who really set them up.
Well, it could be about a misunderstanding. Maybe Percy accidentally uses his powers in a way that Thalia misinterprets as a threat to her leadership among the demigods. So she lashes out at him, and Percy, not one to back down easily, fights back.