Gabrelle has brown hair, barely touching her shoulders, with large green eyes and an upturned nose.
Strength and abilities
In the 'WoT Companion' Gabrelle's strength in the power is classified 19(7) which is enough to use the Travel Weaves proficiently. During the Last Battle Gabrelle heals some of Logain's wounds, indicating her abilities in some of the Healing Weaves.
Gabrelle's behavior with Logain and her attempts to seduce or persuade him indicates the she is not the typical Brown Sister, with a mind only fascinated by books and research of ancient knowledge and very few interests to the mundane world.
She is old enough to have been Aes Sedai much longer than Logain Ablar has even lived.
Attack on the Black Tower
She is currently sleeping with Logain to get information from him. As mentioned in the Companion, she eventually found it exhilirating - she found her helplessness against Logain strangely thrilling, in a way that she could not against normal men (as she could channel and they could not); Logain's masking of the bond would also slip sometimes, giving Gabrelle positive feedback through the bond.
She manages to escape the Turning technique being performed by Mazrim Taim, his lackeys and sisters of the Black Ajah at the Black Tower and fights in the Last Battle alongside Logain. She tries to tell him the Seals belong to the Amyrlin Seat, and is frightened when he plans to use balefire to reach Sakarnen.
Once Androl Genhald and Pevara Tazanovni recover the remaining Seals to the Dark One's prison from Taim, Gabrelle tells Logain he must break them when the time comes. She is still with Logain when he makes the decision to save the refugees and to break the seals, she convinces him of the task and gives him the name "Sealbreaker". It is assumed she stays with him after the Last Battle and does not return to the White Tower.