Hi, I'm wondering how does one improve relations with a castle? Especially after you conquer it. For villages, there are always quests but not for castles.
I dont think there is a way. But i dont think its necessary. Most of my castles hate me because of my religion but there is no disadvantage to it. They pay taxes and let me in, so no problem.
You can send a spy, not sure if it works for your own castles or those belonging to a faction you're working for, there's also the option to ask a companion to improve relations with a location (probably works better the higher their persuasion is).
Spies only works with towns and villages...