Elyas Machera was a Warder to the Aes Sedai Rina Hafden. He trained Lan Mandragoran to be a Warder. At some point in his life, Elyas became a wolfbrother and had to abandon the Aes Sedai he is bonded to. His wolf name is Long Tooth, which is a reference to the long knife he wields. Elyas, like all Wolfbrothers, is able to talk to and communicate with wolves. Unlike other Wolfbrothers, such as Perrin Aybara, he lives with wolves and shuns human kind. Soon after discovering his ability, he was hunted by the Red Ajah who believed that he was using the One Power to communicate with the wolves. He was forced to kill a couple of Warders who chased him in a wood. The trauma of which scarred him as he dislikes killing warders, because he is one.
After Perrin and Egwene al'Vere escape from Shadar Logoth they meet up with Elyas, who informs Perrin of his ability to speak to wolves. Later, Elyas helps Perrin free his wife Faile from the Shaido Aiel.
Read more about this topic: Minor Wheel Of Time Characters