Jaime Lannister is a cocky bastard. He’s handsome, filthy rich, one of the best swordsman in all of Westeros and could have his pick of pretty much any woman in all the lands (so of course he chooses his twin sister…gross!). So even while chained up as a prisoner of Robb Stark, Jaime still treats Robb like he is a little boy playing at being a leader. That bravado took a hit though once Robb brought in his dire wolf Grey Wind to spend some quality time with The Kingslayer