From Tar Valon Library
Velina Behar is a Saldaean Aes Sedai of the White Ajah. She is also a member of the Black (TGS, Ch. 39). Like others of that Ajah, she values logic highly, though she is blindled by the same prejudices and assumptions that many Aes Sedai make - namely that no group apart from them is capable of teaching how to channel, and if they cannot do a thing, no one can. She is both a Sitter for her Ajah and a member of Elaida's inner council. The other Aes Sedai consider her to be very self possessed. She was one of the Sitters before the split and one of the ones that voted to depose Siuan. She flees the White Tower before Egwene is raised (TGS, Ch. 46).
"No ter'angreal has ever been found that can 'control' a woman's channeling ...Very few have ever been found that perform the same function. Therefore, logically, if such a ter'angreal were found, or more than one, improbable as that must be, there could not be sufficient of them to control more than two or three women at most. It follows that the reports of these so-called Seanchan are exaggerated wildly. If women on 'leashes' exist, they cannot channel."
(Reference: The Path of Daggers, Chapter 25)