House Nasidiena (pronounced nah-sih-dee-EN-nah) is a Viridian senatorial family whose base of power is primarily in and around the city of Eryx in the Bay of Ertan. They are known for their close alliances and regular arrangements with the powerful mercantile interests in the cities around the bay, often lending their political and social standing to advance the goals of those that bankroll them.
House Nasidiena was one of the sponsors of the ill-fated colonial expedition that established the short-lived nation of Arkarain.