Medlir is the pseudonym for Arithon's disguise in Ships of Merior, following the Battle of Strakewood. Through the use of his shadow powers, he appears to be a man in his mid-twenties, compactly built to the point of slenderness. He has nondescript ash brown hair falling over thin cheekbones, and his eyes are a muddy gray-hazel.
When Dakar is initially suspicious about Medlir's good nature, he first looks for Arithon's wrist scars before realizing that they could be covered with shadow. He then tries to summon invisible trails of mage-fire at his fingertips, not realizing that Arithon has blinded his own mage-sight. Later, Dakar notes that Medlir says precious little about himself or his past.