Amber Midthunder as Princess Yue: The compassionate spiritual leader of the Northern Water Tribe.

A Martinez as Pakku: The veteran waterbending master of the Northern Water Tribe and a fierce defender of their traditions.

Irene Bedard as Yagoda: An empathetic healer who serves as a role model for her tribe’s female waterbenders. 

Joel Oulette as Hahn: A strong and skilled warrior with an unwavering loyalty to his tribe. 

Nathaniel Arcand as Chief Arnook: Father to Princess Yue and the respected leader of their tribe.

Meegwun Fairbrother as Avatar Kuruk: A previous Avatar with a haunted past. 

Arden Cho as June: A tough and persistent bounty hunter known for her ruthless efficiency. 

Utkarsh Ambudkar as King Bumi: The ancient and mercurial ruler of the Earth Kingdom city of Omashu.

Danny Pudi as the Mechanist: An eccentric inventor and engineer who’s doing his best to raise his son in a war-torn world. 

River Chauhan as Teo: The idealistic and high-flying son of the Mechanist.

James Sie as the Cabbage Merchant: A long-suffering vegetable vendor in Omashu. 

Momona Tamada as Ty Lee: An energetic and upbeat teen and one of Princess Azula’s best friends. 

Thalia Tran as Mai: An unflappable and deadpan teen who, along with Ty Lee, is one of Princess Azula’s closest allies.

Ruy Iskandar as Lt. Jee: The first officer of Prince Zuko’s ship. 

Hiro Kanagawa as Fire Lord Sozin: The ruthless and ambitious previous ruler of the Fire Nation and grandfather of Fire Lord Ozai.

C.S. Lee as Avatar Roku: A wise and benevolent past Avatar from the Fire Nation.

François Chau as The Great Sage: The venerated spiritual leader of the Fire Nation and guardian of Avatar Roku’s shrine. 

Ryan Mah as Lt. Dang: Commander Zhao’s second-in-command. 

George Takei as the voice of Koh: An ancient, predatory spirit.

Randall Duk Kim as the voice of Wan Shi Tong: Appears in the form of a giant owl and is also known as the Spirit of Knowledge.