It is interesting that Brendas is counted among the trustworthy Aes Sedai by Siuan and Egwene. She was included in the circle that healed Mat Cauthon; and she was included in the forces of the light during the Battle against the Black Ajah in Tel'aran'rhiod.
While in Salidar, she questions Nynaeve al'Meara on her progress with her block and seems to think she has the best plan for breaking it down, so Nynaene's marvelous "discoveries" can continue.
She is writing in the Little Tower when Nynaeve asks her where to find Siuan and Leane. Nynaeve thinks that she is one of the few Aes Sedai to have never asked her about Rand. Nynaeve also thinks Brendas is the only Aes Sedai to be completely emotionless.
Brendas was participating in a fake convention in Tel'aran'riod (formally to discuss important matters but really an attempt to expose and attire the Black Ajah), when the Black Sisters attacked.