Petyr Baelish

Robert wanted feasts, tourneys, and never to hear the word ledger; Baelish made all three possible and was rewarded with total trust and no supervision whatsoever. Coin appeared whenever it was needed, which Robert took for competence and never once examined.

By the end the Crown was six million dragons in debt, half of it owed to Casterly Rock, and a great deal of the missing money had quietly become Baelish's own. He is the perfect parasite for this particular king: a man who understood that Robert's boredom with governing was itself an exploitable resource.