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  ====Season 2====
  Brienne is first introduced when she defeats Ser Loras Tyrell to win the sword tournament held by Renly Baratheon, who has declared himself King, and is rewarded with a place in his kingsguard. Catelyn Stark arrives at Renly's camp soon afterward, and successfully negotiates an alliance between Robb Stark and Renly, but Renly is promptly killed by a shadow demon with the face of Renly's brother and rival Stannis, who has discovered he is the rightful heir to House Baratheon, but whom Renly intended to kill the next day. Brienne kills two of Renly's kingsguard in self-defense, when they attack her thinking she murdered Renly, and Catelyn counsels her to flee with her back to Robb's camp in the Westerlands. Brienne swears allegiance to Catelyn. At Robb's camp, Catelyn releases the captive Ser Jaime Lannister and tasks Brienne with taking him to King's Landing, forcing Jaime to vow to return Sansa and Arya Stark to Catelyn in exchange.