Who are the best characters to include in a 'Percy Jackson and Thalia' au fanfiction aside from Percy and Thalia?

The Hunters of Artemis could be a great addition. Since Thalia was once a part of them, it would be interesting to see how she interacts with them again, especially in the context of her relationship with Percy. Zoe Nightshade, if brought back in some way, could be a very cool character to include. She has a strong personality and a tragic backstory. Also, Clarisse La Rue could be in the story. Her tough - as - nails attitude and her rivalry with Percy could spice things up, especially when it comes to the relationship between Percy and Thalia.

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.

Annabeth is a great choice. Her intelligence and strategic thinking could add a lot to the story. For example, when Percy and Grover are in a tight spot, she could come up with a clever plan to get them out. Another good character is Tyson. His strength and loyalty would be useful in battles and dangerous situations.

Jason is another good choice. He has a history with both Percy and Reyna. His leadership skills and his connection to the Roman side of the demigod world could bring in new plotlines. For example, he could help Percy and Reyna understand some of the more complex Roman demigod politics that they need to navigate.

Nico di Angelo would also be an interesting character to bring in. His dark past and his connection to the underworld could provide a contrast to the more positive and light - hearted relationship between Percy and Rachel. He might have his own motives that either help or hinder Percy and Rachel's mission.

Annabeth is a great character to include. She's smart, strategic, and her relationship with Percy adds a lot of depth. Grover is also good. His loyalty and his connection to nature can bring interesting storylines. Nico di Angelo can be a really cool addition too. His powers over the dead and his somewhat brooding personality can create some great drama.

Aside from Percy, Jason Grace is often included. He has his own set of powers and experiences from being a Roman demigod, which can create great conflicts and alliances in fanfiction. Piper McLean is also a great character to add. Her charm - speak ability can be used in really creative ways in a story. And of course, Leo Valdez with his mechanical skills and humorous personality can add a lot of fun and action to the fanfiction.

Annabeth could be a great addition. She could bring her strategic mind to help Percy deal with Medusa. For instance, she might come up with a plan to use Medusa's own pride against her.

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.

Annabeth could be a great addition. She can provide her strategic mind and wisdom. For example, when Percy and Nico are on a quest, she could stay back at the camp but offer advice through Iris - messages. And when they get stuck, her knowledge of architecture and mythology can help them find solutions.