He is lean with wings of white at his temples. He is tall, just over a hand shorter than Lan Mandragoran.
He accompanies Rand al'Thor and Merise to Algarin Pendaloan's house in Tear, where Rand recovers after cleansing saidin. He watches Lan and Jahar Narishma practice with thier swords in the courtyard with the other Warders.
Nethan also accompanies Merise and Bassane, Merise's other Warder, when they visit Salidar and the Rebel Aes Sedai. Later, he is part of the entourage that Rand takes to meet the Daughter of the Nine moons, who turns out to be Semirhage. Bassane also joins Merise and Bassane when Merise seeks an audience with Rand.