Well, Percy's relationship with his friends would likely become more complex. If his twin brother was a bit of a troublemaker, Percy's friends might be divided in their opinions. Some might want to give the twin a chance, while others, like Grover, might be more worried about how the twin's actions could affect Percy. On the other hand, if the twin was really helpful and kind, Percy's friends would probably welcome him wholeheartedly, and Percy would have an even stronger support system within his group of friends.
In a fanfiction, if Percy had a twin brother, it could change his friends' relationships in many ways. Percy's friends might feel a bit jealous at first, especially if Percy starts spending more time with his twin. However, as time passes, they could see the twin as an addition to their group. For instance, if the twin has a special skill like being able to communicate with certain mythical creatures that Percy can't, the friends could start relying on him too. This would lead to a more inclusive and diverse dynamic within the group, with Percy and his twin at the center, and their friends adjusting to having two Jacksons in their midst.
In this fanfic, Percy's friends would need to accept his new identity. Some might be more accepting than others. For example, the more open - minded ones would see it as just another part of Percy. However, there could be some who are afraid. Percy would have to work hard to show them that he can control his werewolf side. His relationship with his friends would be tested, but if they truly are his friends, they would come to terms with it. They would also have to protect his secret from those who might want to harm a werewolf. This would bring them closer together as they face this new challenge as a group.
His friends might be initially shocked. Hermione would probably be very intrigued and start researching right away about twins in magic. Ron might be a bit jealous at first, feeling like Harry's attention is being divided. But overall, they would likely support Harry and be curious about his twin.
Some of his friends might be very wary at first. After all, Hades has a rather dark reputation. But if Percy can show them the good in Hades, they might gradually come around. For example, Annabeth might be initially skeptical but after seeing how Hades helps Percy in some way, she could start to accept the friendship.
Naruto's life would change a great deal. He would no longer be alone growing up. There would be someone who truly understands him on a deeper level. They could train together, and Naruto might learn new techniques from his twin. Also, the villagers' perception of Naruto might change as they compare him to his twin. Maybe his twin is more well - behaved, which could either make Naruto feel pressured to be better or resentful.
It could also strengthen his bond with his friends. Realizing that others are interested in their story and are creating their own versions of their relationships could make Percy feel closer to his friends. He might even share some of the interesting fanfiction ideas with them and have a good laugh together.
His powers would likely become more god - like. He might gain the ability to control lightning, like Zeus. Also, his strength and speed could be enhanced to a much greater degree. His control over water, which was his main power before, could also be amplified and perhaps combined with his new lightning powers in some unique ways.
At first, it could be strained. Draco, being used to being the only son in the family's eyes, might feel threatened by his twin. He could be jealous if his twin shows more magical talent or is more popular at Hogwarts. But as they grow older, they might start to understand each other better. For example, if they face a common enemy, like a bully from another house, they could come together and realize the importance of family.
His friends might be more suspicious of him at first. Since Titans are often seen as the enemies in the Percy Jackson world, his friends could worry that Percy has some hidden, malevolent Titan - influenced agenda.
It could change in several ways. If Merlin's twin sister is also part of Arthur's court, Arthur might be more protective of both of them, seeing them as a pair. Or, he could be more suspicious of Merlin if his sister has a different approach to magic. Maybe she's more open about it, which makes Arthur question Merlin's secrecy.
The relationship with Poseidon would be extremely complicated. Poseidon would be torn between his love for Percy and his fear of what Percy could become as Kronos' twin. He might try to distance himself from Percy at first, which would deeply hurt Percy. On the other hand, Percy's relationship with some of the minor gods might improve. Since they are often overlooked by the major gods, they might see Percy as a potential ally in changing the status quo. Percy's relationship with Luke, if he were still alive in this fanfiction, would also be interesting. Luke might try to use Percy's connection to Kronos to his advantage, but Percy would have to be careful not to be manipulated by Luke.