Key characters in Fire Emblem Fates include Corrin, Azura, Felicia, Jakob, Kaze, Silas, Mozu, Shura, Izana, and members of the Hoshido clan like Ryoma, Hinoka, Takumi, Sakura, Hana, Subaki, Saizo, Orochi, Rinkah, Kagero, Oboro, Hinata, and Hayato. Each character has a unique role and contributes to the game's plot.