House Frey- House Frey is an extremely important house in Westeros. Their seat of power is a pair of identical castles on either side of a river with a bridge spanning them. The castles are known as the twins. They don't rule over any other lords, but they have a strategic advantage of having a large close knit family and being a shortcut across a wide river in the Riverlands. They aren't a main focus in the story, but they have a large army and are key supporters for anyone who gains them as allies. There are many characters from House Frey, but the only inportant one is Lord Walder Frey, who is past 90 years old. He has over 29 true born sons and daughters and an countless number of based born children and even more grandchildren and great grandchildren. Their sigil is two blue towers united by a bridge on a feild of grey.
House Bolton- House Bolton is an important house in Westeros. Their seat of power is known as The Dread Fort. They don't rule over any other lords, but they are the most feared house in the north, were they reside, and all of Westeros. They aren't a main focus of the story, but have a large army and all fear them. There are only two important characters from House Bolton and those are Roose and his base born child Ramsay. Their sigil is a flayed man on a field of pink. Their official house words are "our blades are sharp." but another Bolton motto is " A flayed man holds no secrets."
The Nights Watch- The Nights Watch isn't a house of Westeros but an ancient military order dedicated to holding the Wall, a 700 foot tall and 300 mile wide...wall of ice.The men of the nights watch wear all black and range from proud knights to the lowest of the low, once you say their sacred oath there is no leaving, you're there for life. Their Oath is
"Night gathers, and now my watch begins. It shall not end until my death. I shall take no wife, hold no lands, father no children. I shall wear no crowns and win no glory. I shall live and die at my post. I am the sword in the darkness. I am the watcher on the walls. I am the fire that burns against the cold, the light that brings the dawn, the horn that wakes the sleepers, the shield that guards the realms of men. I pledge my life and honor to the Night's Watch, for this night and all the nights to come."
The Nights watch has nineteen Castles alongside the wall, in its prime everyone of them was manned and ready, but at the time of the story only three remain garrisoned...poorly. One of the three that remain are Eastwatch-by-the-sea, a trading post castle manned by less than 200. Another is the Shadow Tower, the western one. Finally the one right in the middle is Castle Black the largest (that is still garrisoned). The watches job is to stop wildlings, or whatever other devilish things live in the haunted forest or, the land of always winter.
(Side note: The watch is my favorite part of the story. I would totally join them if it were real.)