Couladin is an Aiel of the Domai sept, of the Shaido Aiel. He is tall and broad-shouldered with hair the colour of flames. He is also relatively young being short of his middle years. His first brother is Muradin. They are both of the Black Eyes Society.
Couladin went with his brother Muradin to Chaendaer, so that Muradin could gain permission to enter Rhuidean to become a clan chief for the Shaido Aiel because Suladric, the previous chief, had died. His first encounter with Rand has him coming to blows with the Dragon Reborn before the Wise Ones interfere and send Couladin back to the Shaido tents. When both Rand and Mat Cauthon return from Rhuidean without Muradin, Couladin attacks them, accusing them of murdering his brother. When he spies the Dragon markings on Rand's arms, he leaves with the Shaido very angry and very quickly. During the journey Couladin is given the dragon marks like Rand's by Asmodean as a distraction for Rand.
At Cold Rocks Hold, Couladin is spurned by Lian, wife of Rhuarc and Sister-wife to Amys and also the Roof-Mistress of Cold Rocks Hold. He leaves in anger and later that night takes the Shaido north to Alcair Dal. When he gets there he shows his 'markings' to the other clan chiefs and lies about what is seen in Rhuidean. This leads to the chiefs siding with Rand, who ultimately tells the truth. Outraged, Couladin once again moves the Shaido, this time towards Jangai Pass, on his way out of the Three Fold Land into Cairhien. Along the way he and the renegade Shaido capture "wetlanders" and make them gai'shan, a move that does not sit well with the other clan chiefs.
When Couladin finally arrives Cairhien he, and the 160,000 Aiel warriors he has, lay siege to the city. During the siege the Shaido are attacked by Rand and his army. During the battle a group of Shaido encounters a band of Tairens and Cairhienin soldiers under the command of Mat. During the battle Couladin attacks Mat personally when Mat is knocked off his horse and is himself killed by Mat.
Read more about this topic: Minor Wheel Of Time Characters