Petyr Baelish
Petyr Baelish (seasons 1–7) portrayed by Aidan Gillen. Lord Petyr Baelish, nicknamed "Littlefinger", is the Master of Coin in King Robert Baratheon's Small Council. Petyr is a master manipulator who knows the ongoing affairs within the Seven Kingdoms, thanks to his spies. While Petyr at first is assumed to be an ally of Ned Stark, he secretly resents him for marrying Catelyn Tully and betrays him, leading to Ned's execution. Petyr owns a King's Landing brothel, where he employs (and mistreats) several workers. He also has an ongoing feud with Lord Varys, another of Westeros' spymasters. After the Battle of Blackwater, Sansa Stark (Catelyn's daughter) is cast aside by King Joffrey for Margaery Tyrell. Petyr attempts to persuade Sansa to leave the capital with him, but she refuses. When Joffrey is poisoned at his own wedding, Sansa is secretly smuggled out of the capital by Petyr, who planned Joffrey's assassination with Lady Olenna Tyrell. He then takes her to the Eyrie where he is to marry her aunt and Catelyn's sister, Lysa Arryn. While at the Eyrie, it is revealed that Petyr has fallen in love with Sansa due to her resemblance to her mother. Lysa discovers this information and tries to have Sansa killed, only for Petyr to push her through the castle's moon door to her death instead. Sansa lies for Petyr, and says Lysa jumped to her death of her own accord. Petyr and Sansa then journey to Winterfell, where Petyr arranges for Sansa to marry Ramsay Bolton. Petyr then travels to King's Landing and reveals to Cersei that Sansa, a suspect in Joffrey's murder, has resurfaced in the North. Petyr returns to the Vale and commands the Knights of the Vale to join his cause to reclaim Winterfell from the Boltons. The Knights of the Vale then assist Jon Snow's wildling army against the Boltons, and Winterfell is returned to Stark hands. With Jon Snow, new King in the North, in the south with Daenerys Targaryen, Petyr attempts to divide Sansa, Arya, and Bran, the recently reunited Stark siblings. Bran (now the Three-Eyed Raven), however, uncovers his treachery, reveals the litany of crimes he committed against the Starks, and sentences Petyr to death.