Wil al'Seen is a young adult from Emond's Field.
He is described as the most handsome boy in the Two Rivers, who charms all the girls. Perrin Aybara once told Egwene al'Vere that Aram, a Tinker, reminded him of Wil, specifically Wil's attractiveness to girls.
He greets Perrin when Perrin arrives at Jac al'Seen's house. He goes with Perrin to rescue the prisoners taken by the Children of the Light when they are in the Two Rivers. He is with Perrin when they are ambushed by Trollocs in the Waterwood. He participates in the Battle of Emond's Field.
He is in the Battle of Dumai's Wells.
After the Battle of Malden he now has turns with the other Two Rivers men by being Perrin's bodyguard. He is with Perrin when they find land that appears to have been affected by the Blight. Later, Perrin demands Wil to find all the wolfhead banners in camp and burn them.
Wil acts as Perrin's bodyguard the day of Perrin's trial. He is present when Perrin creates Mah'alleinir. Perrin then asks him to fetch the wolfhead banner for him. Perrin then lifts it to the gathered crowd and declares his acceptance at becoming their Lord and leader.