The open areas are King’s Landing, the royal capital of the Seven Kingdoms, and Sunspear in Dorne. This means that all characters need to be able to reside in King’s Landing or Sunspear for the foreseeable future. This is one of the most important things to consider when selecting a character and considering a concept.
Players wishing to play in King’s Landing should choose characters from the King’s Landing region, the Stormlands, the Riverlands, the Reach, the Vale, the Westerlands and to a lesser degree the North. Characters from the Iron Isles and Dorne can only rarely be in King’s Landing.
Players wishing to play in Sunspear in Dorne should primarily choose characters from Dorne. Non-Dornish characters can only rarely be based in Sunspear.