House Greyjoy- House Greyjoy is a smaller ancient house in Westeros, but still insanely important. Their seat of Power is Pyke. They rule the smaller houses on the Iron Islands. They are a main focus of the story as well. The main characters of House Greyjoy are Theon, Asha, Victarion, Euron, Balon, and Aeron. Their sigil is a golden kraken on a field of black. Their words are "We Do Not Sow."
House Targaryen- House Targaryen is a banished house from Westeros, they used to be the rulers until they were Usurped by the Baratheons during Robert's Rebellion. Their seats of Power were Dragonstone and Kings Landing, They Ruled the Entire Kingdom and the Crownlands from those locations. They are also a main focus of the story. The main characters of House Targaryen are Viserys, Daenerys, Aerys, Young Griff, Aemon, and Rheagar. Their sigil is a red three headed dragon on a field of black. Their House words are "Fire and Blood."
House Martell- House Martell is a main house in Westeros. They were founded by Mors Martell and Nymeria of the Rhoynar. Their seat of Power is Sunspear. They rule the smaller houses in the deserty south coast of Westeros called Dorne. They aren't a main focus in the story, but there are a few PoV characters in Dorne. The main characters in House Martell are Doran, Oberyn, Arianne, Quentyn, And all of the Base born children given the name Sand. Their sigil is a red sun pierced by a yellow spear on a field of orange. Their words are "Unbowed, Unbent, Unbroken."