Petyr 'Littlefinger' Baelish (Aidan Gillen)Lord Petyr Baelish, popularly called Littlefinger, is an extremely minor lord, ruling over just a small area of the shores of the Vale of Arryn. Despite this, his extreme financial acumen has seen him rise to the rank of Master of Coin, the treasurer of the Seven Kingdoms, under King Robert Baratheon.He grew up a foster brother to Lady Catelyn Stark, one of the few contacts she has at court. He has long harbored an unrequited crush on her and as a young man fought and lost a duel for her hand.. It is this defeat, and her rejection, in part that spurred him to become the driven man that he is.In addition to being Master of Coin, Baelish runs several businesses, most popularly a brothel he oversees with great relish.Littlefinger is usually a step ahead of others and revels in the uncertainty he provokes with his cunning schemes of playing people off of one another. He exudes an unctuous charm. He particularly enjoys verbally and strategically sparring with Lord Varys and Tyrion Lannister.