Characters in Star Wars - Catalyst - A Rogue One Novel

Galen Erso

Also in Rogue One - A Star Wars Story, Star Wars - Rebel Rising

Orson Krennic

Lyra Erso

Also in Star Wars - Rebel Rising

Jyn Erso

Also in Star Wars - Rebel Rising

Sheev Palpatine

Also in Star Wars Episode I - The Phantom Menace, Star Wars: The Clone Wars, Star Wars Episode III - Revenge of the Sith, Star Wars Episode VI - The Return of the Jedi, Star Wars - Dark Disciple, Star Wars - From a Certain Point of View, Star Wars - Lords of the Sith, Star Wars - Tarkin, Thrawn, Thrawn: Alliances

Mas Amedda

Also in Star Wars - Aftermath - Life Debt, Star Wars - Tarkin

Poggle the Lesser

Janus Greejatus

Also in Star Wars - Tarkin

Sly Moore