This topic might have a better name.
Sesha since it is spelled that way in the script.
Talk about it here.
Seksa was the daughter of Anulf. After his disappearance she became the leader of a band of survivors from a crash on Cherdor. Her stepmother Mertil didn't agree with her being the leader. (AUDIO: The Whispering Forest)
Behind the scenes
The script given to download subscribers has her name as Sesha, which is exactly what you hear in the story.