"Westerosi" refers to the inhabitants and culture of Westeros, a fictional continent in the A Song of Ice and Fire series by George R.R. Martin. It is characterized by its feudal system, where noble families, such as the Starks and Lannisters, vie for power and control over various regions. The continent is divided into several kingdoms, each with its own unique customs and traditions. The landscape of Westeros includes diverse environments, from the icy North to the warm South. Key locations include the Iron Islands, Dorne, and the Riverlands. The political intrigue and conflicts among the noble houses are central themes in the series, influencing the fate of the realm.