She has the copper skin of a Domani, and is thin and nearly as tall as a man. She is willowy, graceful, and beautiful.
She lost her ageless look after being stilled. 
Once Leane was considered a strong sister in the One Power by Aes Sedai standard, at the same level as Sheriam, so she was a very high ranking Aes Sedai, among the most influential sisters in the last twenty years; but after being stilled and then Healed by Nynaeve al'Meara, she lost around 2/3 of her strength becoming a low ranking Aes Sedai.
She was an Accepted with Moiraine Damodred, though Leane was raised to Aes Sedai sometime earlier.
Prior to her stilling she was strong in the One Power and stood high in the Aes Sedai hierarchy.
She was one of the Blue Ajah sisters who presented the shawl to Moiraine and Siuan Sanche when they first became Aes Sedai. She then escorted Moiraine to the Blue Ajah living quarters. As Aes Sedai, she resumed her friendship with Siuan and Moiraine once they became Aes Sedai.
She was Keeper of the Chronicles under Siuan Sanche, raised from the Blue Ajah.
While on the run under the name of Amaena, she begins trying to use her Domani charms on men, with mixed results. She is captured by Gareth Bryne—who notices that she seems out of practice with Domani seduction—with Min and Siuan after a slight misunderstanding caused by their companion Logain, but the latter comes and saves them. Eventually their quartet reach Salidar and join the rebels hiding there. She helps Siuan run the eyes-and-ears for the Salidar Aes Sedai, saying she built up a large network in Tar Valon itself. She also helps Siuan to guide the Salidar Six all the while giving the appearance that she and Siuan despise each other.
When Nynaeve al'Meara Heals her from being stilled, she joins the Green Ajah instead of returning to the Blue. Due to her being Healed by a woman, her strength with the One Power has been severely reduced and as a result she stands fairly low among Aes Sedai now. After Egwene al'Vere's arrival, she becomes one of her spies in Lelaine's group.
During the celebration in honor of the new Amyrlin Seat, she dances with Mat Cauthon and kisses him.
As Egwene starts experimenting with the production of cuendillar after having rediscovered the weave for making it, Leane turns out to be unique among the rebels, due to her unusual strength with Earth. She can create cuendillar with almost the same speed and efficiency as Egwene, and is far better than Kairen Stang and Ashmanaille, the two sisters behind her in cuendillar making skill.
After the failed attempt to block Tar Valon harbor she is imprisoned in the open cells of the White Tower. She is beaten by Desala Nevanche, who seems to believe she is a wilder rather than who she is.
She is kept in one of the open cells as a prisoner. Egwene visits her and tells her of her intent to remain in the White Tower and try the attack from the inside. Egwene tells her to slip in bits of discord in her conversations to her visitors.
Egwene is visiting Leane in the cells when a bubble of evil erupts and begins to melt Leane's cell. She is saved when her two jailers Gelarna and Musarin pull her out of the cell with weaves of Air. She is finally released from captivity when Egwene becomes Amyrlin Seat of the White Tower.
Back in the Tower Edit
Egwene sets up a meeting in which Leane attends, in Tel'aran'riod between Aes Sedai, Sea Folk Windfinders, and Aiel Wise Ones. It is decided at the meeting that Accepted will go and train with the Wise Ones for six months and they would then train with the Sea Folk for a further six months before returning back to the White Tower. They would then make a choice a year later on where they would wish to finish their training. Sea Folk and Wise One apprentices would also go through this training program but to the White Tower and the other channeling faction. It is agreed that for every two Accepted who leave, two Wise One apprentices and two Sea Folk apprentices will be exchanged. The Sea Folk Bargain is also modified so that Aes Sedai sisters no longer have to teach Sea Folk Windfinders anymore and that Sea Folk Aes Sedai can now return back to their homeland and be the channelers who teach the Sea Folk Windfinders. Finally all ter'angreal that are already owned by the Aiel or by the Sea Folk cannot be claimed by the White Tower.
The Last BattleEdit
Leane witnesses the arrival of the Sharan army by whom she is captured. Demandred releases her with a message for the Dragon Reborn: to tell him that he has come to kill him. Leane is able to hold her composure during the whole process. She keeps fighting the Sharans once she is released and ends up identifying Doesine Alwain's headless body, fighting alongside, among others, Raechin Connoral and Manda Wan.
She witnesses Egwene's death and describes it as a "magnificent burst of light." She also finds Vora's sa'angreal in the crystal column that is the sole earthly remnant of Egwene al'Vere.
Min sees her looking through a transparent mask of herself, screaming. This refers to her being stilled, her appearance being altered as a result. (fulfilled)