Yes, several new faces will appear in Season 3 just as they were new to the book. At San Diego Comic Con 2025, Disney announced the casting of Bianca and Nico Di Angelo, children of Hades who team up with Percy in the third book. Olive Abercrombie will portray Bianca, and Levi Chrisopulos will play Nico.

Entertainment Weekly has confirmed that Dafne Keen and Saara Chaudry have been cast on the Disney+ series for season 3 as major characters from the books. Keen (Deadpool & Wolverine, His Dark Materials) will recur in the franchise as powerful goddess Artemis,

With Percy Jackson's second season a few months away, production for season 3 has already begun, and Artemis' story is already looking promising.