Gwyer Warhein was the half-breed captain of the Green Riders some two hundred years ago. He betrayed the last Sealender king to help deliver Smidhe Hillander to the throne. He bears the same brooch that Laren uses that tells them if what someone is saying is either true or false. When Captain Mapstone collapses with the advent of wild magic in First Rider's Call, the ghost of Warhein contacts Laren to help her control her ability.