Harrion only had rats for companions, and he had spent his time chasing them away or staring at the small and narrow window near the top of the eastern wall. While the other northerners fought and covered themselves in glory, he shamefully spent his time losing battles and being held captive instead. Before, he had some hope that his king would exchange some prisoners for him, but the news of the Red Wedding extinguished the last of it. He did not want to believe it at first, but as time passed, his belief was slowly chipped away. It even started to make sense after a while. The prissy southerners couldn't beat the Starks in a straight fight, so they decided to win through treachery instead. And the treacherous Bolton was surely in on it!