She is very short with gray hair. She is imposing. The ending of her surname suggests a Cairhienin origin.
Observing Jala's deference to the other Sisters involved in Egwene's capture it can be guessed that she is a middle or low ranking Aes Sedai. So her level of strength in the one power is not particularly high.
At the time of the Aiel War she had two Warders, one was a round-faced man playing a stately melody on a flute, the other a pale-haired guy no more than twenty
Jala and Merym galloped back to the Tower when they discovered who they have caught.