He has been manipulated enough in his life to get a sense of it. True, he might still make mistakes and trust the wrong people, but being around Sansa in Winterfell, he knows what this is. "You will find more kindness if you offer it as well. Otherwise, all you'll find is pity."

He glanced at the other figures in the prison. "Eventually, you will be freed. You are not here for any true crime. If need be, I will speak for each of you." He had promised her that he would, so he will. Even if he is annoyed with her.