Naruto would face the challenge of raising a daughter in a world he doesn't fully understand. He may not be familiar with the education system in Annabeth's world, which likely focuses on things like mythology and combat training for demigods. Also, there could be political challenges. The demigod world may have its own power struggles and hierarchies, and Naruto being an outsider could be seen as a threat or at least a strange addition to the family dynamic.
One big challenge would be cultural differences. Naruto is from a ninja - based culture where things like honor and clan loyalty are important. Wendy is from a world of magic and guilds. Naruto would have to understand and adapt to Wendy's world's values. Also, he might face opposition from some in Wendy's world who don't trust an outsider.
Well, Naruto would face quite a few challenges as Mikoto's father. Firstly, he has his own reputation and duties as a hero of the village. Balancing his time between being a father and fulfilling his village responsibilities would be tough. Secondly, Mikoto is from the Uchiha clan which has a dark history. Naruto would need to make sure Mikoto doesn't get influenced by any negative Uchiha ideologies. He'd also have to deal with the fact that Mikoto might inherit some of the Uchiha's pride and stubbornness, which could lead to clashes between them as she grows up.
One challenge could be gender expectations. In a world where certain gender roles are the norm, being a female in a father role might face some resistance or confusion from others in the fanfiction world. But this could also be an opportunity for the story to explore breaking gender norms.
One challenge would be dealing with students who don't respect his authority. Naruto was always a bit of a rebel himself, so he might find it hard to enforce strict rules. Another challenge could be teaching complex ninja techniques to students with different levels of ability.
One challenge could be office gossip. People might start talking if they notice Percy and Annabeth getting too close. This could create a difficult work environment for both of them. Another challenge is the power dynamic. Percy has to be careful not to abuse his power as a boss when it comes to his relationship with Annabeth.
He would face the challenge of over - protection. Given his own history filled with danger, it'd be hard for him not to be overly cautious with his kids. For example, he might be reluctant to let them participate in dangerous school activities like the Triwizard Tournament.
One big challenge would be finding skilled ninjas to help him. Ushiogakure might not have a large population to start with. He'd need to either train new ninjas from scratch or convince others to join him. Another issue could be dealing with any existing rivalries or feuds in the area.
One major challenge would be the cultural difference. Naruto comes from a world of ninjas with its own set of values, and England has a long - established and very different aristocratic and cultural system. Another would be the political intrigue. The English court is known for its complex power plays, which Naruto, who is used to more straightforward battles, might find difficult to navigate.
One challenge could be controlling the new power. Just like Naruto had to learn to control the Nine - Tails' chakra, he'd have to figure out how to use Achilles' power without overexerting himself. Another might be dealing with enemies who would target his new weakness, if he has one like Achilles' heel.
One challenge could be the complexity of the jutsu itself. His father's jutsu might be very advanced and require a high level of chakra control that Naruto doesn't initially have.