Red Ajah
Focuses on castigating the wrong and dangerous use of the One Power which mostly consists in capturing male
channelers and bringing them to the Tower for
gentling. Also it means, especially in the past, to search and eradicate any group of female channelers who gathered outside the White Tower law. They are the largest Ajah with approximately 200 sisters, comprising one-fifth of all Aes Sedai.
[1] The leader's title is
Highest and at the time of the
Last Battle it was
Tsutama Rath. Red sisters
bond no
Warders.
Green Ajah
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. The current holder of the title is
Adelorna Bastine. Green sisters bond as many Warders as they wish, though a Green with only one Warder is typically married to him.
Gray Ajah
Focuses on diplomacy and mediation in politics. They are the third largest Ajah, and the leader's title is
Head Clerk.
Serancha Colvine is the current holder of the title.
Brown Ajah
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.
Jesse Bilal is the current First Chair. The librarians of the
Tower Library are mostly Brown sisters.
Yellow Ajah
Focuses on
Healing. They are the fifth largest Ajah, and the leader's title is
First Weaver.
Suana Dragand is the current First Weaver. Accepted with a great
Talent for Healing generally join the Yellow upon raising.
Blue Ajah
Focuses on causes of righteousness and justice. They are the sixth largest Ajah, and the leader's title is
First Selector, which, at the moment, is
Lelaine Akashi. They have the largest
eyes-and-ears network.
White Ajah
Focuses on logic and philosophy. They are the smallest Ajah, and the leader's title is
First Reasoner. The current First Reasoner is
Ferane Neheran. White sisters rarely bond Warders, and apparently they have no eyes-and-ears network.
Black Ajah
The existence of an eighth Ajah, the "
Black Ajah", whose members are
Darkfriends has been vehemently denied and remained unconfirmed until recently. Black sisters keep their allegiance a secret and belong to one of the seven main Ajahs as well. The Black Ajah is ruled by the
Great Council and it is unknown whether the head of this council has an official title. Until the Last Battle, the head of the Supreme Council was
Alviarin Freidhen.
The sizes of the Ajahs have remained in roughly the same proportions since their formation, with rarely a shift of more than one place in the ranking. But the
cleansing of saidin means that the Red Ajah's current purpose is now no longer valid, so it remains to be seen what effect this will have on the Ajahs and the Tower itself.