Janet Varney Korra Voice David Faustino Mako Voice P.J. Byrne Bolin Voice J.K. Simmons Tenzin Voice Seychelle Gabriel Asami Sato Voice Dee Bradley Baker Naga, Pabu, Lemurs Voice Darcy Rose Byrnes Ikki Guest Voice Kiernan Shipka Jinora Voice Maria Bamford Pema Guest Voice Jeff Bennett Shiro Shinobi, Radio Broadcaster Voice Tom Kenny Referee Guest Voice Jason Harris Ring Announcer Guest Voice Rami Malek Tahno Guest Voice Joaquim Dos Santos Mako's Fan Guest Voice, Director Ki Hyun Ryu Director Michael Dante DiMartino Writer Bryan Konietzko Writer