Thurma is a character featured in the upcoming Power of the Dark Crystal. She is a girl made of fire who comes from the U-Mun people who live at the blazing center of the planet. She is sent on a mission to request a shard of the Crystal of Light, of which Queen Kira and King Jen are the guardians, so that she may take it back to heal their dying Sun. Jen and Kira refuse the request, as breaking the crystal will cause the Skekses and Garthim to come back. Frustrated, she steals a shard anyway and flees into the tunnels under the castle, accompanied by Kensho, an outcast Gelfling.
Interestingly, her name is a play on words, as "therma" is the Greek word for "heat".