Samar Dev was a scholar, inventor, and witch from Seven Cities. Although primarily an inventor, she would not release an invention, however valuable, unless she determined that it could not be used abusively. Consequently, she shelved most of her inventions. She bound spirits to her knife. Samar Dev was described as "a woman with ample womanly charms" and older by a decade, maybe more, than Cutter (as observed by him).
Samar Dev met Karsa Orlong when she was left stranded with a broken foot in the Ugarat Odhan after the self-powered carriage she built broke down. In exchange for her help in entering the city of Ugarat, Karsa in turn helped her return to the city. She accompanied him to Moraval Keep where he defeated a K'Chain Nah'ruk.
Samar Dev finally invited Karsa Orlong to share her bed.