Cast and characters
Main article: Characters of the Grishaverse - Ben Barnes as General Kirigan / The Darkling / Aleksander, general of the Second Army and the Shadow Summoner
- Jessie Mei Li as Alina Starkov, an orphan and former assistant cartographer of the Royal Corps of Surveyors in the First Army. She discovers she is the Sun Summoner, a rare Grisha with the ability to control light. Alina was reimagined as half-Shu in the series.
- Kaylan Teague as Young Alina
- Archie Renaux as Malyen "Mal" Oretsev, an orphan tracker in the First Army and Alina's childhood best friend
- Freddy Carter as Kaz Brekker, leader of the Crows, known as Dirtyhands and the Bastard of the Barrel
- Amita Suman as Inej Ghafa, member of the Crows, known as the Wraith
- Kit Young as Jesper Fahey, member of the Crows, a skilled sharpshooter
- Zoë Wanamaker as Baghra, Alina's Grisha trainer
Nikolai Lantsov and Wylan van Eck will be introduced in season 2.