The Complete Guide to All 21 Major Houses on Game of Thrones

Location: The Vale
Sigil: Black mockingbird on a yellow background
Major members:

• Petyr "Littlefinger" Baelish, uncle/Lord Protector to Robin Arryn and the Lord of Harrenhal

Why They Matter:
House Baelish is made up of only Littlefinger himself — but being who he is, he's managed to do pretty well for his house. He married the mother of the heir to the Eyrie, promptly got her out of the picture, and now essentially has the ear of Robin Arryn all the time. He's also the Lord of Harrenhal, which was given to him by Tyrion back in season two. What does all that mean? That a guy we don't trust farther than we could throw him has a whole lot of power — and now Sansa owes him big. That should go well.