She is gangly with a strong chin and startlingly blue eyes.  She has a litling voice.
Nisain is relatively weak in the One Power. Her level of strength is described by "The Wheel of Time Companion" as 37(25) which is a quite low level in Aes Sedai hierarchy.
She had some small repute in matters of laws and treaties.
She is from Murandy.
She has some small repute in matters of laws and treaties. 
She has allied herself with the Rebel Aes Sedai.
As the strongest saidar reader of the group, she gives the Rebel Hall of the Tower the report of what she could read there.  She said they could not tell what had been done, but that more saidin had been used than saidar.