Chiron would be an important character. He could offer wisdom and guidance as Percy and Annabeth navigate their married life. Also, Nico di Angelo. He could be a bit of an outsider still, but he's become a good friend. He might come to them for advice on his own relationships, and in return, he'd help them out when there are supernatural threats near their home.
Definitely Grover. He could be like their go - to babysitter when they want some alone time. He'd tell their child all kinds of stories about the old days. Another great character would be Tyson. He might build them a really cool house by the sea as a wedding gift, and he'd visit often to show them his latest inventions.
The other demigods from Camp Half - Blood should be included. People like Clarisse, who at first might seem grumpy about the whole wedding thing but then has a change of heart and gives a really nice gift. And Nico, who could use his powers to create some amazing lighting effects during the evening reception. Their presence would add a lot of flavor to the story.
Grover would be a great addition. In an AU, he could be Percy's best friend who is always getting him into (and out of) trouble. For example, in a college AU, Grover could be the one who convinces Percy to join a wild fraternity. He could also provide some comic relief. Another good character is Thalia. In a superhero AU, she could be a powerful superheroine with lightning powers. She could be a mentor or a rival to Percy and Annabeth, depending on the plot.
Obviously, Grover has to be there. He's Percy's best friend. He could be the one who gives a really heartfelt speech at the wedding. Also, Chiron would be great. He could offer some wise words to the newlyweds. And Tyson, Percy's half - brother, would add a fun element with his big, kind heart.
Grover would be a great addition. He could be the quirky sidekick in the high school setting, always getting into comical situations while also providing some sage advice to Annabeth and Percy based on his own experiences. For example, he could help Percy figure out how to ask Annabeth to the prom.
Grover could be a great addition. He could be the goofy but loyal friend who always gets caught in the middle of Percy and Annabeth's drama. For example, he might accidentally spill some secrets that cause more trouble between them. Another good character could be Clarisse. She could be the school bully who has a grudging respect for Percy and Annabeth but still tries to cause problems for them now and then.
Grover could be a great addition. He's Percy's best friend, and his presence can add some comical relief to the story. For example, he could accidentally interrupt a romantic moment between Percy and Annabeth, leading to some awkward but funny situations.
I think Kiba and Akamaru would be really fun to include. Kiba's boisterous nature could create some comical moments during the wedding preparations or at the wedding itself. Akamaru could also be part of some cute interactions with Naruto and Fuu. Tsunade would also be an important character. As the Hokage, she could have some say in the marriage, or at least offer her wisdom and support to Naruto. And Rock Lee could be there, showing off his crazy training regime and giving Naruto some motivation for his new married life.
I bet their home would have a nautical theme. There would be seashells everywhere, maybe some old maps on the walls. Percy would probably have a small aquarium with some cool sea creatures. And Annabeth would have a big bookshelf filled with books on architecture and mythology. There would also be some trophies and mementos from their adventures, like the Golden Fleece or a piece of the Labyrinth.
Well, they could face issues like how to balance their heroic duties with their married life. For instance, Percy might get called away on a quest right when they planned a romantic dinner. Or perhaps in the fanfiction, they start a school for demigod children together as a married couple, which would bring its own set of comical and heartwarming situations.
Well, it could be about their daily adventures. Maybe they're living in a small seaside town. Percy might be working as a lifeguard, using his water skills. Annabeth could be an architect, designing beautiful buildings. They have a simple but happy life, going on picnics on the beach, and at night, they sit on their porch, looking at the stars and sharing stories of their past quests.