From Tar Valon Library
Author: Kyria d'Oreyn
Mavra Mallen is the Wisdom from Deven Ride in the Two Rivers (TEotW, Ch. 16).
She comes up to Emond's Field to see to things while Nynaeve goes after Moiraine and the others to bring them back (TEotW, Ch. 16).
Nynaeve worries about her, because she has to go back to her own village and cannot stay in Emond's Field for too long (TGH, Ch. 8).
During her Accepted's testing, Nynaeve is told that Mavra had to go back to Deven Ride and that Malena Aylar took her place in Emond's Field (TGH, Ch. 23).
She is very possibly dead now, as after the battles in the Two Rivers, Elwinn Taron is the Wisdom of Deven Ride (LoC, Prologue).