Appearance and Abilities
Jeaine had the appearance of a typical Domani, with coppery skin and a swan neck. She had dark brown eyes.
She detested men, and chose Green partly so she could beguile and control them. Yet, she was not attracted to women.
She was one of the seven Aes Sedai that escorted Siuan Sanche and Moiraine Damodred to Tamra Ospenya when they were to be raised from Accepted to Aes Sedai and swear the Three Oaths. It is unknown if she was Black at the time already or not.
After this failed they fled to Tarabon. During the trip in a ship, Jeaine tried to use one of the ter'angreal stolen by them. This fluted black rod produced a bar of balefire that nearly sunk the ship.
In Tanchico they tried to steal the male a'dam from the Panarch's Palace. There she used the ter'angreal weaving balefire in the attempt to kill Nynaeve al'Meara after Nynaeve had defeated the Forsaken Moghedien. After she missed, Nynaeve was wondering if the uncontrollable ter'angreal killed Jeanine. 
Regardless of what her task from Moghedien was or if it was carried out or not, Jeaine was killed by Thomdril Merrilin at Shayol Ghul in the Last Battle while trying to sneak inside the Pit of Doom using the Mask of Mirrors to pose as Cadsuane Melaidhrin.