Focuses on capturing male channelers and bringing them to the Tower for gentling. They are the largest Ajah with approximately 200 sisters, comprising one-fifth of all Aes Sedai. The leader's title is Highest. Red sisters bond no Warders.
Also called the 'Battle Ajah', Greens stand ready for the Last Battle. They are the second largest Ajah, and the leader's title is Captain-General. Green sisters bond as many Warders as they wish, though a Green with only one Warder is typically married to him.
Focuses on diplomacy and mediation in politics. They are the third largest Ajah, and the leader's title is Head Clerk.
Focuses on gathering and preserving knowledge. They are the fourth largest Ajah, and are governed by a ruling council, the head of which is called First Chair. The librarians of the Tower Library are all Brown sisters.
Focuses on Healing. They are the fifth largest Ajah, and the leader's title is First Weaver. Accepted with a Talent for Healing generally join the Yellow upon raising.
Focuses on causes of righteousness and justice. They are the sixth largest Ajah, and the leader's title is First Selector. They have the largest eyes-and-ears network.
Focuses on logic and philosophy. Leader's title is the First Reasoner. White Sisters tend not to bond to a Warder, and do not have an eyes-and-ears network.