She is also secretly part of the Black Ajah.
Activities
Zanica, along with Desala Nevanche, Melare, Arebis and three other Aes Sedai, were involved in Leane Sharif's capture at Northharbor.
Egwene al'Vere has some lessons with her.
Zanica is listed as a member of the Black Ajah in Verin Mathwin's book.