Fera Sormen is an Aes Sedai of the White Ajah. She is also Black Ajah.
Fera is not very strong in the
One Power. Her level of strength is described by "The Wheel of Time Companion" as 33(21) which is a middle/low level in Aes Sedai hierarchy. With this level of strength she is unable to open alone a suitable gateway to Travel.
She was on the
White Tower secret expedition to kidnap Rand al'Thor in Cairhien.
She was taken prisoner by the
Asha'man at Dumai's Wells and has sworn fealty to Rand al'Thor. However, unlike the other Aes Sedai, her oath was a lie.
Elza Penfell and Fera travel together from Tar Valon to Cairhien. They discover that they share a dark allegiance.
It is presumed that Fera, along with the other Black Ajah prisoners, was
Compelled by Verin Mathwin to serve Rand and ensure that he doesn't die until the Last Battle.
, Crossroads of Twilight Chapter 24
, Lord of Chaos Chapter 55
, Winter's Heart Chapter 13
↑ Wheel of Time Companion
, The Path of Daggers Prologue